Ratios & Proportions

Problem 1301

Dry concrete can be made by mixing sand, gravel and cement in the ratio 1 : 2 : 3.
If you want 1800 kg of dry concrete, how much of each will you need?

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Problem 1302

Find the value of $\square$ in the equation $300 \div \square=30$ .

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Problem 1303

Divide $1 \frac{1}{2}$ by $\frac{3}{4}$ .

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Problem 1304

Jackie used $\frac{3}{5}$ of February's oil ( $1 \frac{1}{2}$ liters). Find January's oil amount.

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Problem 1305

How many aquariums can we fill with 54 liters if one holds 12 liters? Include fractions. Answer: $54 / 12$ aquariums.

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Problem 1306

4 people share 5 kg of coffee. How many kg does each person get? Choose one: (A) 0-1 kg (B) 1-2 kg (C) 2-3 kg (D) 3-4 kg.

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Problem 1307

Ruby read 7 books in 14 months. Find her reading rate in books per month: $\frac{7}{14}$ .

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Problem 1308

Ruby read 7 books in 14 months. Find her reading rate in books per month: $\text{Rate} = \frac{7}{14}$ books/month.

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Problem 1309

Find the simplified ratio of sugar to flour for chocolate chip cookies using 10 cups of sugar and 20 cups of flour.

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Problem 1310

Convert 16,550 feet to miles using the conversion: 1 mile = 5,280 feet.

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Problem 1311

Find the density of cooking oil if a chef fills a $50 \mathrm{~mL}$ container with $43.5 \mathrm{~g}$ of it.

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Problem 1312

Find the cost of 5659 grams of lamb chops at \$14.25 per kilogram.

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Problem 1313

If 10 million dollar bills (6.14 inches each) are laid end-to-end, how many times around the 84-mile I-275 loop does this cover? Round to 1 decimal.

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Problem 1314

Calculate the mass of $\mathrm{NaCl}$ needed for 0.1 L of a 0.5 M solution. Molecular weight is $58.44 \mathrm{~g}$ .

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Problem 1315

A customer wants as many $61 / 4^{\prime \prime}$ pieces of $1 / 2$ '' roundstock from a 48'' piece. How many can you provide?

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Problem 1316

A customer wants $61 / 4^{\prime \prime}$ pieces of $1 / 2$ ' roundstock from a $48^{\prime \prime}$ piece. How many can you provide, considering $1 / 8^{\text{"}}$ waste?

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Problem 1317

Find missing values A, B, C, and D in the ratio table: A, 18, 30, C, 3; 7, B, 5, 4, D.

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Problem 1318

Find the unit price of turkey per pound if a $1 \frac{1}{4}$ pound package costs \$9. Show your work.

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Problem 1319

Trevor's family has 6 members and 3 bathrooms. Each person showered for 480 mins and used 72 liters. Water costs \$0.20/liter. Total cost?

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Problem 1320

Lúcia uses energy at 420 kcal/h. Find her energy use rate in calories/min $\left(\frac{\mathrm{cal}}{\mathrm{min}}\right)$ .

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Problem 1321

Compound X has a molar mass of $153.03$ g·mol $^{-1}$ and the following composition:
| element | mass % | |---|---| | carbon | $47.09\%$ | | hydrogen | $6.59\%$ | | chlorine | $46.33\%$ |
Write the molecular formula of X.

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Problem 1322

A survey showed that 4 out of 5 students owr a bicycle. Based on this result, how many of the 800 students in a school own a bicycle?

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Problem 1323

The ratio of the number of baskets made by Tony to the number of baskets made by Colin is 2 to 3 . Tony made 10 baskets. How many baskets did Colin make?

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Problem 1324

Perform the indicated opention $5 g-2340 \mathrm{mg}$

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Problem 1325

A 21,000-BTU air conditioner requires how many foot-pounds of energy to operate?
A 21,000-BTU air conditioner requires $\square$ foot-pounds of energy to operate. (Simplify your answer.)

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Problem 1326

Use the given conversion factor to convert 12 tsp to mL . $\begin{aligned} 1 \mathrm{tsp} & =5 \mathrm{~mL} \\ 12 \mathrm{tsp} & =[?] \mathrm{mL} \end{aligned}$ Enter

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Problem 1327

Calculate the number of MOLECULES in 3.16 moles of nitrogen dioxide ( $NO_2$ ).

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Problem 1328

How many times larger were early transistors ( $1 \times 10^{4}$ micrometers) compared to today's transistors ( $< 1 \times 10^{-2}$ micrometer)? $10^{6}$ $10^{2}$ $10^{-6}$ $10^{-2}$

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Problem 1329

Calculate the volume in $\mathrm{dL}$ of 3.01 kg of iron with a density of $7.86 \mathrm{~g/cm}^{3}$ . Convert density to $\mathrm{kg/dL}$ .

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Problem 1330

Compare the sugar concentration of Patrick's solution ( $\frac{3}{3+4}$ ) and Thomas's solution ( $\frac{6}{6+7}$ ).

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Problem 1331

Find the mass in mg of 892 μmol of silver oxide (Ag₂O) to 3 significant figures in standard notation.

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Problem 1332

Find the number of oxygen atoms in $5 \mathrm{~mol}$ of $\mathrm{CO}_{2}$ .

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Problem 1333

Convert a speed of 5.8 mi/h to ft/s using the conversion factors: 1 h = 15 min, 1 mi = 5280 ft, 1 min = 60 s.

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Problem 1334

A bike wheel is 26 inches in diameter. Convert this to millimeters using $1$ inch $=25.4$ mm.

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Problem 1335

Don ran 3 miles, stopping every $\frac{1}{2}$ mile. How many stops did he make, including the end point?

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Problem 1336

Convert 50 miles per hour to miles per minute using the expression: $\frac{50 \text{ miles}}{1 \text{ hour}} \times \frac{1 \text{ hour}}{\square \text{ minutes}}$ . What goes in the box? Options: 6, 60, 360, 3,600.

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Problem 1337

Divide 204 m by 6 m. What is the result?

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Problem 1338

Convert 12 feet to inches. Choices: 1, 24, 120, or 144 inches?

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Problem 1339

Phelan exchanged \$250 for euros, spent 150 euros, and converted back. How much of his original \$250 remains? Round to the nearest cent. 1 euro = 1.3687 \$

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Problem 1340

What expression converts 80 USD to AUD using the rates: 1 USD = 1.0343 AUD, 1 AUD = 0.9668 USD?

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Problem 1341

G. Calculate the denominator of the fraction that is equal to the stated fraction with the numerator shown. \begin{tabular}{cll} \hline Fraction & Numerator & Denominator \\ \hline 1. $12 / 36$ & 144 & \\ \hline 2. $84 / 6$ & 42 & \\ \hline 3. $1 / 16$ & 8 & \\ \hline \end{tabular}

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Problem 1342

After 15 minutes this patient (Q11) is not adequately anesthetized, you now administer one cartridge of 2% lidocaine, 1:100,000 epinephrine, buffered with 0.1 mL of 8.4% sodium bicarbonate.
a) How many total mL of drug have they now received? b) How many mg per mL in an 8.4% buffering agent (BA)? c) How many mg per cartridge of an 8.4% buffering agent (BA)? d) How many mg of each drug have they received? e) How many total mg of drug have they received? f) How many more mg of local anesthetic could this pt have? g) What is the limiting drug? h) What will you document in the chart for this appointment (including dosages from Q11)

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Problem 1343

Mixed Review e made a smoothie with 1 cup of yogurt, 3 tablespoons of peanut butter, 2 teaspoons of chocolate syrup, and 2 cups of crushed ice.
**Kiran tried to double this recipe. He used 2 cups of yogurt, 6 tablespoons of peanut butter, 5 teaspoons of chocolate syrup, and 4 cups of crushed ice. He didn't think it tasted right. Describe how the flavor of Kiran's recipe compares to Clare's recipe.
*How should Kiran change the quantities that he used so that his smoothie tastes just like Clare's?

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Problem 1344

Directions: Write the ratio in simplest form.
1. 28 elementary schools to 16 middle schools
2. 30 treadmills to 36 elliptical machines
3. 18 buses to 66 cars
4. 180 red marbles to 145 blue marbles

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Problem 1345

Question Watch Video Show Examples As a fraction in simplest terms, what would you multiply the first number by to get the second? First number: 5 Second number: 4 Answer Attempt 1 out of 20 $5 \cdot \boxed{\phantom{0}} = 4$ Submit Answer

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Problem 1346

A beach erodes at 4 cm/year. Convert this to mm/day. Which expression gives the correct units and value?

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Problem 1347

Which expression converts 100 inches/min to feet/min? Consider the options involving unit conversions.

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Problem 1348

Varia pays \$3,500 yearly. Convert to euros at 0.7306 euros per \$1. How much is that monthly in euros? Round to nearest euro.

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Problem 1349

Which formula converts 80 USD to AUD using the rates: 1 USD = 1.0343 AUD, 1 AUD = 0.9668 USD?

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Problem 1350

Rita has 8.64 pounds of seed. If 7.2 pounds plants 1 acre, how many acres can she plant?

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Problem 1351

A crew built a 9 km road in $5 \frac{1}{4}$ days. How many km did they build daily? Answer as a mixed number.

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Problem 1352

Indy and Fort Wayne are 13 cm apart on a map, equating to 120 miles. If Kokomo is 6.5 cm from Indy, find the real distance between Indy and Kokomo, rounded to the nearest tenth of a mile.

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Problem 1353

Calculate the number of Tim Hortons stores per capita in Canada in 2015, given 3660 stores and a population of 35.75 million. Round to three decimal places in scientific notation.

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Problem 1354

In 2006, the US had 285 million TVs and a population of 298.4 million. Find TVs per capita rounded to four decimal places. $\text { Answer }=0.9612$

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Problem 1355

How many 8" I-beam sections can you cut from $320 \mathrm{lbs}$ if each weighs 12 $3 / 8 \mathrm{lbs}$ ?

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Problem 1356

Emily made blueberry muffins for her scout troop's bake sale. For her first batch, she used 1 cup of blueberries and 2 cups of oats. She didn't think that would make enough muffins, so she made a larger second batch with 3 cups of blueberries and 6 cups of oats. When she tod the last tray out of the oven, her little brother asked if he could have a muffin with lots of blueberries as a snack. Which batch had a greater ratio of blueberries to oats?
The first batch had the greater ratio.
The second batch had the greater ratio.
Neither. The batches had the same ratio.

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Problem 1357

The outside air temperature when Santa is flying typically reaches a low of -76 (negative 76) degrees Fahrenheit $\left[{ }^{\circ} F\right]$ during the cruising phase of his flight.
Express this outside air temperature in units of degrees Celsius $\left[{ }^{\circ} \mathrm{C}\right]$ .
Enter a numerical answer without any units.

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Problem 1358

Keisha made \$144 for 8 hours of work. At the same rate, how much would she make for 13 hours of work?

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Problem 1359

Find the unit rate that helps you solve the problem. How many inches are in $10$ feet?
$10$ feet $\times$ ______ $=$ $?$ inches
$\frac{1 \text{ inch}}{12 \text{ feet}}$
$\frac{1 \text{ foot}}{12 \text{ inches}}$
$\frac{12 \text{ inches}}{1 \text{ foot}}$
$\frac{12 \text{ feet}}{1 \text{ inch}}$

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Problem 1360

Convert. When necessary, express your answer as a decimal.
1) 36 feet = \_\_\_\_\_ yards 2) 264 inches = \_\_\_\_\_ feet 3) 6 miles = \_\_\_\_\_ yards 4) 15,480 yards = \_\_\_\_\_ miles 5) 3 miles = \_\_\_\_\_ feet 6) 400 ounces = \_\_\_\_\_ pounds 7) 32 pounds = \_\_\_\_\_ ounces 8) 7.25 tons = \_\_\_\_\_ pounds 9) 11,000 pounds = \_\_\_\_\_ tons 10) 15 minutes = \_\_\_\_\_ seconds 11) $8\frac{1}{2}$ hours = \_\_\_\_\_ minutes 12) 49 weeks = \_\_\_\_\_ days 13) 8 pints = \_\_\_\_\_ cups 14) 14 quarts = \_\_\_\_\_ gallons

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Problem 1361

(5) $78 \text{ ounces} = \frac{\phantom{00}}{} \text{ cups}$ (6) $200 \text{ cups} = \frac{\phantom{00}}{} \text{ gallons}$

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Problem 1362

1) 36 centimeters = millimeters 2) 890 millimeters = centimeters 3) 3800 meters = kilometers 4) 11.5 kilometers = meters 5) 1.5 meters = millimeters 6) 0.0815 meters = centimeters 7) 65,000 mm = km 8) 75 mm = meters 9) 14 centimeters = meters 10) 70 meters = centimeters 11) 1200 meters = kilometers 12) 3.2 kilometers = meters 13) 80 meters = millimeters 14) 0.5 kilometers = meters 15) 137 centimeters = meters 16) 10.2 centimeters = millimeters 17) 43,000 millimeters = meters 18) 71 meters = millimeters

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Problem 1363

12) 732 mg = \_\_\_\_\_ g 13) 76 t = \_\_\_\_\_ kg 14) 0.054 t = \_\_\_\_\_ kg 15) 43,000 mg = \_\_\_\_\_ kg 16) Add: 320 g + 8 kg + 870 mg = \_\_\_\_\_\_\_

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Problem 1364

: السؤال الثاني في 31/12/2008 بلغ رصيد حساب ايراد أوراق مالية في ميزان المراجعة لمحلات محمد 1300 دينار وفي 31/12/2008 وهو تاريخ الجرد تبين ان ايراد الأوراق المالية السنوي 1400 دينار : المطلوب تسجيل قيود التسوية والاقفال اللازمة - 1 تصوير الحسابات التي تأثرت بالجرد واثرها على الحسابات الختامية وقائمة -2- المركز المالي

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Problem 1365

750 men have provisions for 12 days if 150 men have left for how many days does same provisions would last for the oremaining men.

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Problem 1366

Hopewell Area Sites Dashboard I Khan... Bottom Floor and Fi... Classes Epic I The Leading . Canvas Mathtutor - a free si. AdaptEmEx • Hon Graphs, Functions, and Sequences Identifying proportional relationships in tables by calculating unit rates:...
For each table, determine whether it shows that $x$ and $y$ are proportional. If $x$ and $y$ are proportional, fill in the blank with a number in simplest form.
Table 1 \begin{tabular}{|c|c|c|c|c|} \hline $x$ & 6 & 14 & 20 & 24 \\ \hline $y$ & 9 & 21 & 30 & 36 \\ \hline \end{tabular}
Proportional $y$ is $\square$ times $x$ Not proportional
Table 2 \begin{tabular}{|c|c|c|c|c|} \hline $x$ & 12 & 16 & 20 & 24 \\ \hline $y$ & 16 & 20 & 24 & 28 \\ \hline \end{tabular} Proportional $y$ is $\square$ times $x$ Not proportional

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Problem 1367

How many thirds are there in 5? You can earn 5 coins

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Problem 1368

How many $\frac{1}{2}$ are there in 3?

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Problem 1369

8) How many grams are in 238 moles of arsenic?

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Problem 1370

Lisa has played in 6 soccer matches. Her brother Josh has played in 18 soccer matches. Lisa says Josh has played in 12 times as many matches as she has. Use the drop-down menus to explain why Lisa's statement is not correct.
Click the arrows to choose an answer from each menu. Lisa found the number that when Choose... 6 is equal to 18 . Instead, Lisa could have used the equation Choose... $\square$ played in $\square$ Choose... times as many soccer matches as Lisa. $\square$

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Problem 1371

How many moles are in $3.24 \times 10^{22}$ molecules of F? $3.24 \times 10^{22}$ molecules to moles

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Problem 1372

Measurement and Matter Interconverting compound SI units
Convert the following measurement. $2.2 \times 10^{2} \frac{\mathrm{~kg}}{\mathrm{~m}^{3}}=\frac{\mathrm{g}}{\mathrm{~cm}^{3}}$ $\square$ ×10

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Problem 1373

Question 4 A tailor cuts 65 inches of thread to hem a dress. Which measurement is closest to the number of centimeters of thread the tailor cuts?
A 0.05 cm B 52.46 cm C 57.54 cm D 139.7 cm
Question #35 A teacher writes four expressions on a whiteboard. The expressions are shown in the table.
| Expression 1 | $10x + 2x + 8$ | |---|---| | Expression 2 | $6x + 2(x + 4)$ | | Expression 3 | $12x + 8$ | | Expression 4 | $2(6x + 2x + 8)$ |
Which pair of expressions is equivalent?
A Expression 1 and Expression 2 B Expression 1 and Expression 3 C Expression 2 and Expression 3 D Expression 2 and Expression 4

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Problem 1374

Order: Furosemide 40 mg IV push Supply:
How many mLs will the nurse administer? $\qquad$ mLs Drug Reference: Furosemide is safe to administer over 1-2 minutes. If you are administering over 1 minute, how many mLs will you administer per 15 seconds? $\qquad$ mLs/15 seconds If you are administering over 2 minutes, how many mLs will you administer per 15 seconds? $\qquad$ mLs/15 seconds

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Problem 1375

*E12.11 (LO 4), AP K. Kolmer, C. Eidman, and C. Ryno share income on a 5:3:2 basis. They have capital balances of $\$ 34,000, \$ 26,000$ , and $\$ 21,000$ , respectively, when Do Jernigan is admitted to the partnership. Instructions Prepare the journal entry to record the admission of Don Jernigan under each of the following assumptions. a. Don Jernigan purchases $50 \%$ of Kolmer's equity for \ $19,000. b. Don Jernigan purchases$ 50 \% $of Eidman's equity for \$12,000. c. Don Jernigan purchases$ 33 \%$ of Ryno's equity for \$9,000.
Journalize admission of a new partner by investment.

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Problem 1376

with a stronger chocolate flavor than if you blended 3 scoops of chocolate ice cream with 2 cups of milk. Explain or show why.

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Problem 1377

How many pounds are in a 25 kg box of welding rods? How many kg for $9 \mathrm{lbs}$ ? Use $1 \text{ kg} \approx 2 \frac{1}{4} \text{ lbs}$ .

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Problem 1378

Find the unit price of a 12-ounce can of frozen orange juice that costs \$2.04 in cents per ounce.

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Problem 1379

Find the gas consumption rate if you drive 364 miles using 13 gallons: $\text{Rate} = \frac{364}{13}$ miles per gallon.

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Problem 1380

Calculate the unit rates for \$6.29 for 12 quarts. Find dollars per quart and quarts per dollar. Round to the nearest hundredth.

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Problem 1381

Calculate the price per diaper in cents for Brand A (32 diapers, \ $10.49) and Brand B (40 diapers, \$12.49). Round to the nearest tenth. Which is cheaper? Select an answer$ \checkmark$

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Problem 1382

Calculate the cost per diaper for Brand A (32 diapers, \$9.49) and Brand B (50 diapers, \$11.49). Round to the nearest tenth of a cent. Which is the better buy?

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Problem 1383

How many $1/2$ " roundstock pieces of $61/4$ " can you cut from a 48" piece, ignoring waste?

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Problem 1384

A car emits 30.4 tons of CO₂ in 4 years. Calculate its annual carbon footprint in tons per year.

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Problem 1385

How many 6" pieces can be cut from a 48" round stock, considering 1/8" kerf waste?

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Problem 1386

How many $61 / 4^{\prime \prime}$ pieces can you cut from a 48" roundstock? Ignore kerf waste.

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Problem 1387

How many 6 $1/4$ pieces can be cut from a 48" roundstock, ignoring kerf waste?

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Problem 1388

How many 8" sections of I-beam can be cut from 320 lbs if each weighs 12 $\frac{3}{8}$ lbs?

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Problem 1389

Convert 25 kg of welding rods to pounds and find kg needed for 9 lbs. Use $1 \text{ kg} \approx 2.25 \text{ lbs}$ .

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Problem 1390

How many mL of a $2\% \mathrm{w}/\mathrm{v}$ ammonium chloride solution is needed for $75 \mathrm{mEq}$ ?

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Problem 1391

A jet plane travels at 840 mph. How far does it go in 30 seconds? A. 7 B. 16 C. 28 D. 32 E. 60.

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Problem 1392

Find the time in seconds between consecutive simultaneous flashes of two neon signs that flash every 6 and 8 seconds.

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Problem 1393

Find the mass of $125 \mathrm{~mL}$ of bromine ( $\mathrm{Br}_{2}$ ) with a density of $3.12 \mathrm{~g/cm}^{3}$ . Also, what volume does $100 \mathrm{~g}$ of bromine occupy?

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Problem 1394

Calculate the mass of 125 mL of liquid bromine ( $\mathrm{Br}_{2}$ ) with a density of $3.12 \mathrm{~g/cm}^{3}$ .

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Problem 1395

A hiking trail is 24 miles long. The first rest area is at a distance with a 2:9 ratio to the end. Find its distance from the start.

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Problem 1396

American White Pelicans migrate 1680 miles. If the ratio of summer home to stopover is $3:4$ , find the distance to the stopover in mi.

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Problem 1397

Calculate the flow rate in mL/hr for a heart medicine infused at $12.8 \mu \mathrm{g}/(\mathrm{kg} \cdot \mathrm{hr})$ for a $68.3 \mathrm{~kg}$ patient.

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Problem 1398

A doctor prescribes $0.250 \mathrm{~g}$ of medication. If $35000 \mathrm{mg}$ is in $15 \mathrm{~mL}$ , how much mL will be given?

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Problem 1399

Calculate the dosage in mL for $0.00850 \mathrm{~kg}$ of medication available at $8.70 \mathrm{~g} / 12.0 \mathrm{~mL}$ .

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Problem 1400

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1 ...11 12 13 14 15 16 17

Ratios & Proportions

Problem 1301

Dry concrete can be made by mixing sand, gravel and cement in the ratio 1 : 2 : 3.If you want 1800 kg of dry concrete, how much of each will you need?

Problem 1302

Find the value of □\square□ in the equation 300÷□=30300 \div \square=30300÷□=30.

Problem 1303

Divide 1121 \frac{1}{2}121​ by 34\frac{3}{4}43​.

Problem 1304

Jackie used 35\frac{3}{5}53​ of February's oil (1121 \frac{1}{2}121​ liters). Find January's oil amount.

Problem 1305

How many aquariums can we fill with 54 liters if one holds 12 liters? Include fractions. Answer: 54/1254 / 1254/12 aquariums.

Problem 1306

4 people share 5 kg of coffee. How many kg does each person get? Choose one: (A) 0-1 kg (B) 1-2 kg (C) 2-3 kg (D) 3-4 kg.

Problem 1307

Ruby read 7 books in 14 months. Find her reading rate in books per month: 714\frac{7}{14}147​.

Problem 1308

Ruby read 7 books in 14 months. Find her reading rate in books per month: Rate=714 \text{Rate} = \frac{7}{14} Rate=147​ books/month.

Problem 1309

Find the simplified ratio of sugar to flour for chocolate chip cookies using 10 cups of sugar and 20 cups of flour.

Problem 1310

Convert 16,550 feet to miles using the conversion: 1 mile = 5,280 feet.

Problem 1311

Find the density of cooking oil if a chef fills a 50 mL50 \mathrm{~mL}50 mL container with 43.5 g43.5 \mathrm{~g}43.5 g of it.

Problem 1312

Find the cost of 5659 grams of lamb chops at \$14.25 per kilogram.

Problem 1313

If 10 million dollar bills (6.14 inches each) are laid end-to-end, how many times around the 84-mile I-275 loop does this cover? Round to 1 decimal.

Problem 1314

Calculate the mass of NaCl\mathrm{NaCl}NaCl needed for 0.1 L of a 0.5 M solution. Molecular weight is 58.44 g58.44 \mathrm{~g}58.44 g.

Problem 1315

A customer wants as many 61/4′′61 / 4^{\prime \prime}61/4′′ pieces of 1/21 / 21/2'' roundstock from a 48'' piece. How many can you provide?

Problem 1316

A customer wants 61/4′′61 / 4^{\prime \prime}61/4′′ pieces of 1/21 / 21/2' roundstock from a 48′′48^{\prime \prime}48′′ piece. How many can you provide, considering 1/8"1 / 8^{\text{"}}1/8" waste?

Problem 1317

Find missing values A, B, C, and D in the ratio table: A, 18, 30, C, 3; 7, B, 5, 4, D.

Problem 1318

Find the unit price of turkey per pound if a 1141 \frac{1}{4}141​ pound package costs \$9. Show your work.

Problem 1319

Trevor's family has 6 members and 3 bathrooms. Each person showered for 480 mins and used 72 liters. Water costs \$0.20/liter. Total cost?

Problem 1320

Lúcia uses energy at 420 kcal/h. Find her energy use rate in calories/min (calmin)\left(\frac{\mathrm{cal}}{\mathrm{min}}\right)(mincal​).

Problem 1321

Compound X has a molar mass of 153.03153.03153.03 g·mol−1^{-1}−1 and the following composition:| element | mass % | |---|---| | carbon | 47.09%47.09\%47.09% | | hydrogen | 6.59%6.59\%6.59% | | chlorine | 46.33%46.33\%46.33% |Write the molecular formula of X.

Problem 1322

A survey showed that 4 out of 5 students owr a bicycle. Based on this result, how many of the 800 students in a school own a bicycle?

Problem 1323

The ratio of the number of baskets made by Tony to the number of baskets made by Colin is 2 to 3 . Tony made 10 baskets. How many baskets did Colin make?

Problem 1324

Perform the indicated opention 5g−2340mg5 g-2340 \mathrm{mg}5g−2340mg

Problem 1325

A 21,000-BTU air conditioner requires how many foot-pounds of energy to operate?A 21,000-BTU air conditioner requires □\square□ foot-pounds of energy to operate. (Simplify your answer.)

Problem 1326

Use the given conversion factor to convert 12 tsp to mL . 1tsp=5 mL12tsp=[?]mL\begin{aligned} 1 \mathrm{tsp} & =5 \mathrm{~mL} \\ 12 \mathrm{tsp} & =[?] \mathrm{mL} \end{aligned}1tsp12tsp​=5 mL=[?]mL​ Enter

Problem 1327

Calculate the number of MOLECULES in 3.16 moles of nitrogen dioxide (NO2NO_2NO2​).

Problem 1328

How many times larger were early transistors (1×1041 \times 10^{4}1×104 micrometers) compared to today's transistors (<1×10−2< 1 \times 10^{-2}<1×10−2 micrometer)? 10610^{6}106 10210^{2}102 10−610^{-6}10−6 10−210^{-2}10−2

Problem 1329

Calculate the volume in dL\mathrm{dL}dL of 3.01 kg of iron with a density of 7.86 g/cm37.86 \mathrm{~g/cm}^{3}7.86 g/cm3. Convert density to kg/dL\mathrm{kg/dL}kg/dL.

Problem 1330

Compare the sugar concentration of Patrick's solution (33+4\frac{3}{3+4}3+43​) and Thomas's solution (66+7\frac{6}{6+7}6+76​).

Problem 1331

Find the mass in mg of 892 μmol of silver oxide (Ag₂O) to 3 significant figures in standard notation.

Problem 1332

Find the number of oxygen atoms in 5 mol5 \mathrm{~mol}5 mol of CO2\mathrm{CO}_{2}CO2​.

Problem 1333

Convert a speed of 5.8 mi/h to ft/s using the conversion factors: 1 h = 15 min, 1 mi = 5280 ft, 1 min = 60 s.

Problem 1334

A bike wheel is 26 inches in diameter. Convert this to millimeters using 111 inch =25.4=25.4=25.4 mm.

Problem 1335

Don ran 3 miles, stopping every 12\frac{1}{2}21​ mile. How many stops did he make, including the end point?

Problem 1336

Convert 50 miles per hour to miles per minute using the expression: 50 miles1 hour×1 hour□ minutes\frac{50 \text{ miles}}{1 \text{ hour}} \times \frac{1 \text{ hour}}{\square \text{ minutes}}1 hour50 miles​×□ minutes1 hour​. What goes in the box? Options: 6, 60, 360, 3,600.

Problem 1337

Divide 204 m by 6 m. What is the result?

Problem 1338

Convert 12 feet to inches. Choices: 1, 24, 120, or 144 inches?

Problem 1339

Phelan exchanged \$250 for euros, spent 150 euros, and converted back. How much of his original \$250 remains? Round to the nearest cent. 1 euro = 1.3687 \$

Problem 1340

Dry concrete can be made by mixing sand, gravel and cement in the ratio 1 : 2 : 3.
If you want 1800 kg of dry concrete, how much of each will you need?

Find the value of $\square$ in the equation $300 \div \square=30$ .

Divide $1 \frac{1}{2}$ by $\frac{3}{4}$ .

Jackie used $\frac{3}{5}$ of February's oil ( $1 \frac{1}{2}$ liters). Find January's oil amount.

How many aquariums can we fill with 54 liters if one holds 12 liters? Include fractions. Answer: $54 / 12$ aquariums.

Ruby read 7 books in 14 months. Find her reading rate in books per month: $\frac{7}{14}$ .

Ruby read 7 books in 14 months. Find her reading rate in books per month: $\text{Rate} = \frac{7}{14}$ books/month.

Find the density of cooking oil if a chef fills a $50 \mathrm{~mL}$ container with $43.5 \mathrm{~g}$ of it.

Calculate the mass of $\mathrm{NaCl}$ needed for 0.1 L of a 0.5 M solution. Molecular weight is $58.44 \mathrm{~g}$ .

A customer wants as many $61 / 4^{\prime \prime}$ pieces of $1 / 2$ '' roundstock from a 48'' piece. How many can you provide?

A customer wants $61 / 4^{\prime \prime}$ pieces of $1 / 2$ ' roundstock from a $48^{\prime \prime}$ piece. How many can you provide, considering $1 / 8^{\text{"}}$ waste?

Find the unit price of turkey per pound if a $1 \frac{1}{4}$ pound package costs \$9. Show your work.

Lúcia uses energy at 420 kcal/h. Find her energy use rate in calories/min $\left(\frac{\mathrm{cal}}{\mathrm{min}}\right)$ .

Compound X has a molar mass of $153.03$ g·mol $^{-1}$ and the following composition:
| element | mass % | |---|---| | carbon | $47.09\%$ | | hydrogen | $6.59\%$ | | chlorine | $46.33\%$ |
Write the molecular formula of X.

Perform the indicated opention $5 g-2340 \mathrm{mg}$

A 21,000-BTU air conditioner requires how many foot-pounds of energy to operate?
A 21,000-BTU air conditioner requires $\square$ foot-pounds of energy to operate. (Simplify your answer.)

Use the given conversion factor to convert 12 tsp to mL . $\begin{aligned} 1 \mathrm{tsp} & =5 \mathrm{~mL} \\ 12 \mathrm{tsp} & =[?] \mathrm{mL} \end{aligned}$ Enter

Calculate the number of MOLECULES in 3.16 moles of nitrogen dioxide ( $NO_2$ ).

How many times larger were early transistors ( $1 \times 10^{4}$ micrometers) compared to today's transistors ( $< 1 \times 10^{-2}$ micrometer)? $10^{6}$ $10^{2}$ $10^{-6}$ $10^{-2}$

Calculate the volume in $\mathrm{dL}$ of 3.01 kg of iron with a density of $7.86 \mathrm{~g/cm}^{3}$ . Convert density to $\mathrm{kg/dL}$ .

Compare the sugar concentration of Patrick's solution ( $\frac{3}{3+4}$ ) and Thomas's solution ( $\frac{6}{6+7}$ ).

Find the number of oxygen atoms in $5 \mathrm{~mol}$ of $\mathrm{CO}_{2}$ .

A bike wheel is 26 inches in diameter. Convert this to millimeters using $1$ inch $=25.4$ mm.

Don ran 3 miles, stopping every $\frac{1}{2}$ mile. How many stops did he make, including the end point?

Convert 50 miles per hour to miles per minute using the expression: $\frac{50 \text{ miles}}{1 \text{ hour}} \times \frac{1 \text{ hour}}{\square \text{ minutes}}$ . What goes in the box? Options: 6, 60, 360, 3,600.

Directions: Write the ratio in simplest form.
1. 28 elementary schools to 16 middle schools
2. 30 treadmills to 36 elliptical machines
3. 18 buses to 66 cars
4. 180 red marbles to 145 blue marbles

Question Watch Video Show Examples As a fraction in simplest terms, what would you multiply the first number by to get the second? First number: 5 Second number: 4 Answer Attempt 1 out of 20 $5 \cdot \boxed{\phantom{0}} = 4$ Submit Answer

A crew built a 9 km road in $5 \frac{1}{4}$ days. How many km did they build daily? Answer as a mixed number.

In 2006, the US had 285 million TVs and a population of 298.4 million. Find TVs per capita rounded to four decimal places. $\text { Answer }=0.9612$

How many 8" I-beam sections can you cut from $320 \mathrm{lbs}$ if each weighs 12 $3 / 8 \mathrm{lbs}$ ?

(5) $78 \text{ ounces} = \frac{\phantom{00}}{} \text{ cups}$ (6) $200 \text{ cups} = \frac{\phantom{00}}{} \text{ gallons}$

How many $\frac{1}{2}$ are there in 3?

How many moles are in $3.24 \times 10^{22}$ molecules of F? $3.24 \times 10^{22}$ molecules to moles

Measurement and Matter Interconverting compound SI units
Convert the following measurement. $2.2 \times 10^{2} \frac{\mathrm{~kg}}{\mathrm{~m}^{3}}=\frac{\mathrm{g}}{\mathrm{~cm}^{3}}$ $\square$ ×10