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
The vectors u and v have the same direction.
a. Find ∥u∥.
b. Find ∥v∥.
c. Is u=v ? Explain.
a. ∥u∥=□ (Simplify your answer. Type an exact answer, using radicals as needed.)
Question 3 Find the average rate of change of the function f(x)=3x+67, on the interval x∈[3,5].
Average rate of change =□
Give an exact answer.
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The graph of y=f(x) is shown to the right. Identify the intervals on which f(x) is increasing. Which of the following shows every interval on which f(x) is increasing? Choose the correct answer below.
A. (b,c),(d,e),(f,h)
B. (b,d),(f,g)
C. (b,d),(f,h)
D. (b,c),(d,e),(f,g)
n is directly proportional to w. n=54 when w=9 a) Use the information above to write an equation for
n in terms of w. b) What is the value of n when w=13? Give any decimal answers to 1 d.p.
This scatter graph shows some people's scores in two games of bowling. The scores from the two games were added together. What was the highest total score? Bowling scores Game 2
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Game 1
Suppose a drawer contains four green socks, five red socks, and three white socks. We draw one sock from the drawer and it is equally likely that any one of the socks is drawn. Find the probabilities of the events in parts (a)-(e). a. Find the probability that the sock is red.
(Type an integer or a simplified fraction.) b. Find the probability that the sock is green or white.
(Type an integer or a simplified fraction.) c. Find the probability that the sock is brown.
(Type an integer or a simplified fraction.) d. Find the probability that the sock is not green.
(Type an integer or a simplified fraction.) e. We reach into the drawer without looking to pull out four socks. What is the probability that we get at least two socks of the same color?
(Type an integer or a simplified fraction.)
65) f(x)=x+8x2−6x+2 A) x=y+6
B) y=x−14
Objective: (4.5) Find Oblique Asymptote of Rational Function Solve. 66) x2−9x+20>0 A) (5,∞)
B) (−∞,4)∪(5,∞)
Objective: (4.6) Solve Quadratic Polynomial Inequality List the critical values of the related function. Then solve the inequality. 67) x+61>0 A) No critical values; ∅
B) −6;(−∞,−6)
Objective: (4.6) Solve Rational Inequality I
14. The graph of which function has the same axis of symmetry as the graph of y=2x2−8x+3 ? Explain your reasoning.
A. y=−4x2+16x−5
B. y=2x2+8x+7
C. y=3x2−6x+7
D. y=−6x2+10x−1
The right triangle on the right is a scaled copy of the right triangle on the left. Identify the scale factor. Express your answer as a whole number or fraction in simplest form.
x2−14x+49a2+28a+19b For \#30 \& 31, (a) Write the third term for "Completing the Square" of the perfect square trinomial.
(b) Write the perfect square trinomial as a binomial squared.
30) x2+18x+ 31) a2+11a+
Reading Test ⋅ Informational Text
Questions 4-7 refer to the following passage and graph about imported food. Reading the labels on supermarket shelves and displays is like taking a virtual trip around the world. Nectarines from Chile, apples from New Zealand, and shellfish from China are just a few of the items you're likely to find. Increased foreign trade and consumer demand for variety have helped globalize the American food supply. Since 1980, Americans’ consumption of imported foods has risen considerably, as shown in the graph below. U.S. Consumption of Imported Food Key
1980
2009 Source: U.S. Department of Agriculture The U.S. Food and Drug Administration (FDA), charged with keeping the American food supply safe, has expanded its operations. A growing number of FDA employees are now working with international standards-setting organizations, multinational health and trade organizations, and government and private agencies worldwide. Their mission is to ensure that American food is safe to eat regardless of where it was grown, processed, or packaged. This is not an easy task, since U.S. standards and rules often differ from those in other nations. 4. Consumption of which type of imported food tripled between 1980 and 2009?
A grain
B fresh vegetables
C fresh fruit
D fish, fish products, and shellfish 5. According to the passage, why did the FDA get involved with international food-related agencies and private organizations?
A It needed to increase the international flow of food so U.S. consumers would have a variety of food to choose from.
B It needed to make selling imported food in the U.S. easier for foreign producers.
C It needed to work with organizations in other nations to ensure that imported food would meet U.S. safety standards.
D It needed to ensure that imported foods would be competitively priced in U.S. supermarkets. 6. The globalization of the food supply indicates that American consumers value which of the following most highly?
A food grown organically
B food from local food producers
C a wide variety of food, available all year
D seasonal produce 7. What conclusion can be drawn from the information in the graph and passage?
A Americans are likely to continue consuming imported food in the future.
B The market for imported vegetables is more profitable than that for imported fruit.
C As food imports have grown, U.S. production of food has declined.
D Eventually, the U.S. food supply will be entirely imported.
12. Marco has 281 bags of soil to put in his garden. Each bag of soil will cover 7852ft2. How many square feet will Marco be able to cover if he uses all these bags of soil?
Question
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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⋅0=4
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Exer. 21-24: Use polar coordinates to find the limit, if it exists.
21lim(x,y)→(0,0)x2+y2xy222lim(x,y)→(0,0)x2+y2x3−y323lim(x,y)→(0,0)sin(x2+y2)x2+y224lim(4,y)→(0,0)x2+y2sinh(x2+y2)
A cone with a base having a radius of 10 inches has a volume of 261.67 cubic inches. What is the approximate height of the cone?
2.0 inches
2.5 inches
4.5 inches
5.0 inches
For the region formed by the functions f(x)=x2−2x−2 and g(x)=5 on the interval [−1,2], use definite integrals to find the area of the region.
Answer: The area is □
Hint: Follow Example 2.
Solve the system if possible by using Cramer's rule. If Cramer's rule does not apply, solve the system by using another method. Write all numbers as integers or simplified fractions.
−10x−3y=174x−9y=8
24. The drama club sold all the tickets for its annual production in three days. The club sold 143 tickets the first day and 295 tickets the second day. If the drama club sold 826 tickets, how many tickets were sold on the third day of sales? Solve the equation 438+t=826 for the number of tickets, t, sold on the third day of ticket sales.
Find the amount that results from the given investment.
$300 invested at 5\% compounded daily after a period of 4 years After 4 years, the investment results in \\square$ .
(Round to the nearest cent as needed.)
This is Section 4.4 Problem 46:
For the function f(x)=x2−2x+1 on the interval [0,2], the average value of f is is □ . (Use a fraction.) Hint: Follow Exämple 6.
□
In Exercises 1-4, decide whether the function is a polynomial function. If so, write it in standard form and state its degree, type, and leading coefficient. 1. f(x)=4x2−3x+5x3−7 2. h(x)=5x3−7x−2+x−1 3. g(x)=x4−31x2+10−4x3+2x 4. f(x)=8x2−3x+2 In Exercises 5-7, evaluate the function for the given value of x. 5. f(x)=−2x4+x3+5x2−3x−7;x=−1 6. g(x)=5x4−2x3+9x−10;x=−6 7. h(x)=x5−4x3+3x2+11x−8x=7 In Exercises 8 and 9 , describe the end behavior of the graph of the function. 8. g(x)=6x4−3x3+12x2+8x+2 9. h(x)=−5x3+6x2−5x4+x2−1 In Exercises 10-13, graph the polynomial function. 10. q(x)=x4−2 11. h(x)=x3−2x+3 12. k(x)=2x2+3=x3 13. f(x)=x3−2x3+1 In Exercises 14 and 16, describe the x-values for which f is inereasing, decreasing, positive, and negative.
14.
16. 16. Suppose f(x)→−∞ as x→−∞ and f(x)⇒−∞ as x→+∞. Describe the degree and leading coefficient of the function.
JUSTIFY REASONING Consider the statement:
If c is a real number, then a dilation centered at the origin maps the line y=cx to itself. Which statement best determines whether the statement is sometimes, always, or never true and justifies the reasoning?
A) Sometimes; The line y=cx passes through the origin, but depending on the value of c, the image may map onto itself or may be parallel or perpendicular and not map onto itself.
B) Always; The line y=cx passes through the origin and a dilation leaves lines through the center of dilation unchanged.
C) Sometimes; The line y=cx passes through the origin, but if c is negative, the dilation would be perpendicular to the preimage.
D) Never; The line y=cx passes through the origin and because the origin is the center of dilation, the image line will be parallel to the preimage.
The length of a rectangular room is 5 feet greater than its width. Which of the following equations represents the area ( A ) of the room?
- A=x(x+5)A=x+(x+5)A=5xA=2x+2(x+5)
Question 1
During very intense exercise:
Fats are the only energy source
the parasympathetic nervous system is activated
oxygen levels increase in the aorta
the breathing rate (ventilation rate) increases Question 2
What happens to total peripheral resistance during exercise?
Decreases because all the arterioles in the body vasodilate
Increases because the sympathetic nervous system is activated
Increases because arterioles near muscles vasodilate
Decreases because increased CO2 near muscles decreases local arteriole resistance
Your answer was A. Wrong.
Consider the function f(x)=x2−36x−6. Which of the following statements is true about this function? A The function has infinite discontinuity at x=6.
B The function has removable discontinuity at x=0.
C The function has an infinite discontinuity at x=−6.
D The function has no points of discontinuity.
E The function has a removable discontinuity at x=−6.
F None of the above.
10. [-/1 Points]
DETAILS
MY NOTES
AUFBALG8 5.4.022. Use the slope-intercept form y=mx+b. Find the equation of the line that contains the point whose coordinates are (−1,2) and has slope −21.
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Question 1 Sulfonylurea is a type of drug used to treat Type II diabetes. It causes an increase in insulin release from beta cells. Will this drug help patients with Type I diabetes as well? Choose the correct answer and explanation. Yes, because Type I diabetics have less sensitive insulin receptors
No, because Type I diabetics do not need insulin
No, because Type I diabetics do not have beta cells
Yes, because all diabetics need insulin Question 2 Which of the following is true of the absorptive state? Energy input is less than output, so energy is released from breakdown of large biomolecules.
Energy input exceeds output, so energy is stored in large biomolecules.
Energy input is equal to energy output, so the body is in energy balance.
Energy input is less than output, so energy is stored in large biomolecules. 1 pts
Question 3
After a meal
gluconeogenesis occurs
glycogenolysis occurs
glycogen is synthesized
glucagon is released Question 4
Why is polyuria a symptom of hyperglycemia?
Glucose in the nephron filtrate disrupts the normal osmotic gradient
Increased glucose in the blood impairs the ADH receptor
Glucose binds to and blocks the pore of aquaporins
More ADH is released in response to hyperglycemia
Consider the following limit of Riemann sums of a function f on [a,b]. Identify f and express the limit as a definite integral.
Δ→0limk=1∑nxk∗tan2xk∗Δxk;[2,3] The limit, expressed as a definite integral, is
□□□
Question 3 1 pts Some athletes take creatine supplements, which is allowed in most professional sports. Usually when someone takes creatine supplements, the body stops producing as much, so levels increase just a little bit. Think about the purpose of creatine (or creatine-phosphate). Which athletes would benefit the most from creatine supplements? Long-distance cyclist Weight lifter Marathon runner Soccer player
20 (a) When steam is passed over carbon at 700∘C, the equilibrium (partial pressure) for water and hydrogen is 90kPa and 183kPa respectively. (i) Calculate Kp at 700∘C. (ii) What is the new equilibrium partial pressure of hydrogen if after the system had achieved equilibrium, the partial pressure of steam is increased to 150kPa at the same temperature?
[3]
What is the standard enthalpy of formation of PCl3(g) in kJ mol−1? (Note that P4(s) is the standard state of phosphorus) P4(s)+10Cl2(g)→4PCl5(s)ΔH∘=−1774.0 kJ
PCl3(g)+Cl2(g)→PCl5(s)ΔH∘=−156.5 kJ -287.0
+1517.5
+287.0
-1517.5
+474.0
Question 2
What happens to total peripheral resistance during exercise?
Decreases because increased CO2 near muscles decreases local arteriole resistance
Increases because arterioles near muscles vasodilate
Increases because the sympathetic nervous system is activated
Decreases because all the arterioles in the body vasodilate
For the equation y=−5x+2
a) Complete the table:
\begin{tabular}{|c|c|}
\hlinex & y \\
\hline-5 & □ \\
\hline 0 & □ \\
\hline 5 & □ \\
\hline
\end{tabular}
b) Use the appropriate tool to graph the given equation.
−4x+2x2−5x4 20x7+7+18x6 −18x24−18x18+9x17 25 points possible 16/25 answered Question 17 For the following polynomials, identify the degree, the leading term, and the leading coefficient. degree leading term leading coefficient Add Work Next Question
f(x)=−x3−x2x2−1 If there is more than one answer, enter your answers as a comma separated list. If there is no solution, enter NONE. Do not leave a blank empty. (a) The function has x-intercept(s) at x= (b) The function has y-intercept(s) at y= (c) The function has vertical asymptote(s) when x= (d) The function has horizontal asymptote(s) when y= Note: You can earn partial credit on this problem.
Kathy has a checking account in a bank that requires an average daily balance of $300 in order to avoid a $10 monthly fee. If the average daily balance is above $300, then a monthly interest payment equal to 1.4% of the average balance will be added to the account. Kathy's daily balance, in dollars, over the month can be modeled as
f(t)=1601t3−203t2+41t+285,0≤t≤30.
(a) Kathy's average daily balance over the month is $□ (Use an integer.)
(a) Since Kathy's dally average balance is □ -Selectthan $300, she □ - Selectpay the $10 fee.
Hint: Follow Example 8.
plus $25 for each charm. The equation −25x+y=65
(in dollars) of the bracelet, represents the cost y (in of charms. where x is the number
a. Graph the equation.
b. How much does a bracelet with three charms cost?
2,
13. III To throw a discus, the thrower holds it with a fully outstretched arm. Starting from rest, he begins to turn with a constant angular acceleration, releasing the discus after making one complete revolution. The diameter of the circle in which the discus moves is about 1.8 m . If the thrower takes 1.0 s to complete one revolution, starting from rest, what will be the speed of the discus at release?
1-10. Place the correct letter corresponding to each integer on the number line below.
\begin{tabular}{|l|l|l|l|l|l|l|l|l|l|l|l|l|l|l|l|l|l|l|}
\\
\hline & & & & & & & & & & & & & & & & & & \\
\hline
\end{tabular} −10
\begin{tabular}{|c|c|c|c|c|c|}
\hline A. -5 & B. +2 & C. -7 & D. 4 & E. -9 \\
\hline F. -1 & G. +6 & H. -3 & I. 0 & J. -6 \\
\hline
\end{tabular} Write an integer to represent each situation.
\begin{tabular}{|l|l|l|l|l|l|l|l|}
\hline 11. & lost $72 & & 12. & gained 8 yards & & 13. & fell 16 degrees \\
\hline
\end{tabular} Name the opposite of each integer.
\begin{tabular}{|r|c|r|c|c|c|c|c|}
\hline Name the opposite of each integer. \\
\hline 14. & 26 & & 15. & -83 & & 16 & +100 \\
\hline
\end{tabular} Compare the following integers. Write <,>, or =. Write true or false.
\begin{tabular}{|c|c|l|l|c|l|c|c|}
\hline 29. & −3>−7 & & 30. & 9>−1 & & 31 & −6>−2 \\
\hline 32. & ∣−5∣<−5 & & 33. & ∣−8∣=∣8∣ & & 34. & −5<−6 \\
\hline
\end{tabular} 35. List the following temperatures from greatest to least.
\begin{tabular}{|c|l|}
\hline A & The temperature was 25 degrees Fahrenheit below zero. \\
\hline B & The pool temperature was 78 degrees Fahrenheit. \\
\hline C & Water freezes at 32 degrees Fahrenheit. \\
\hline D & The low temperature in December is -3 degrees Fahrenheit. \\
\hline E & The temperature in the refrigerator was 34 degrees Fahrenheit. \\
\hline
\end{tabular}
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learn-us-east-1-pro... Finding the Domain and Range of a Graph
Determine the domain and range for the graph below. Write your answer in interval notation. Domain written in interval notation:
Range written in interval notation:
[0,4]
[0,3]
□□
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This is similar to Section 4.5 Problem 18: Determine the indefinite integral ∫(x3+4)212x2dx by substitution. (It is recommended that you check your results by differentiation.) Use capital C for the free constant. Answer: □ Hint: Follow Example 6.
Determine the indefinite integral ∫x6+536x5dx by substitution. (It is recommended that you check your results by differentiation.) Use capital C for the free constant. Answer: □ Hint: Follow Example 6.
tion list
restion 14
vestion 15 Find the zerrs of the function aloworracally.
f(x)=3x2−x+2 The zeros are □ .
(Sinclly your answer: Type an exact answer, using radicals and ias needed. Use inte
Determine the indefinite integral ∫7x−84dx by substitution. Assume u>0 when ln(u) appears. (It is recommended that you check your results by differentiation.) Use capital C for the f Answer: □ Hint: Follow Examples 5 and 6.
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3. Tricia surveys students in her
computer class about time spent
on computers by students in her
school. Will the survey results from
this sample support a valid inference?
Explain.
A report asked people who got their news from television which television sector they relied on primarily for their news: local TV, network TV, or cable TV. The results were used to generate the data in the table below. Determine whether being female is independent of choice of local TV. Explain your answer in the context of this problem.
\begin{tabular}{|c|c|c|c|c|}
\hline & Local TV & Network TV & Cable TV & Total \\
\hline Men & 67 & 49 & 55 & \\
\hline Women & 85 & 55 & 56 & \\
\hline Total & & & & \\
\hline
\end{tabular} Since □=□ \% and □=□%, the events □ independent.
(Type integers or decimals rounded to one decimal place as needed.)
4. Caleb is comparing the growth of
plants using two different fertilizers. Group A
Group B 1 2 3 4 5
Growth (inches) Part A
Use the measures of center from the
box plots to make an inference about
the data.
A school principal wants to know what theme students prefer for the spring dance. There are 150 students in 6th grade, 200 students in 7th grade, and 187 students in 8th grade. Select all the representative samples that can help the principal draw conclusions about which themes the students prefer.
The students in the 7th grade homerooms
The same number of students from each grade whose names are randomly selected from a hat
The members of student council
Students who attended the winter dance
50 sixth graders, 67 seventh graders, and 62 eighth graders
Assessment, Form A
4.02 Percent Increase and decrease 3. The price of a phone was increased by 16% and then reduced by 10%. What was the overall percentage increase?
Enter your next step here
This is Section 4.5 Problem 58:
Evaluate the definite integral ∫013r2er3dr by the following:
(a) Determine the indefinite integral ∫3r2er3dr by substitution. (It is recommended that you check your results by differentiation.) Use capital C for the free constant. Answer: □
(b) The exact value of the definite integral is □ .
This is Section 4.5 Problem 66:
Evaluate the definite integral ∫2105x−11dx by the following:
(a) Determine the indefinite integral ∫5x−11dx by substitution. (It is recommended that you check your results by differentiation.) Use capital C for the free constant. Answer: □
(b) The exact value of the definite integral is □
(1 point) Using disks or washers, find the volume of the solid obtained by rotating the region bounded by the curves x=y2 and x=1 about the line x=1.
Volume =□
1. Je suis l'ensemble qui comporte les nombres qu'on ne peut pas écrire sous la forme d'une fraction. 2. Je suis l'ensemble qui comporte les nombres dontla partie décimale est limitée ou illimitée périodique. 3. Je suis lensemble qui comporte les nombres dont la partie décimale est limitće. 4. Je suis l'ensemble des nombres entiers positifs. 5. Je suis l'ensemble des nombres rationnels et irrationnels. 6. Les entiers négatifs font partie de cet ensemble.
To estimate the height of a building, a student finds the angle of elevation from a point (at ground level) down the street from the building to the top of the building is 38∘. From a point that is 350 feet closer to the building, the angle of elevation (at ground level) to the top of the building is 57∘. If we assume that the street is level, use this information to estimate the height of the building. Round your answer to the nearest whole number. The height of the building is _______ feet.
A recent poll asked respondents to fill in the blank to this question: "The country when it comes to giving equal rights to women" with one of three choices. The results are shown in the accompanying table using a sample size of 80 men and 80 women. Complete parts a and b below.
\begin{tabular}{|l|c|c|c|c|}
\hline & \begin{tabular}{c}
Hasn't Gone \\
Far Enough
\end{tabular} & \begin{tabular}{c}
Has Been \\
About Right
\end{tabular} & \begin{tabular}{c}
Has Gone \\
Too Far
\end{tabular} & Total \\
\hline Men & 33 & 35 & 12 & 80 \\
\hline Women & 43 & 29 & 8 & 80 \\
\hline Total & 76 & 64 & 20 & 160 \\
\hline
\end{tabular}
A. P(male and responded "hasn't gone far enough")
B. P(hasn't gone far enough | male)
C. P (male I hasn't gone far enough)
b. Find the probability that a person randomly selected from only the men in this group responded "hasn't gone far enough." The probability is □ (Simplify your answer.)
If u=f(x), then du=f′(x)dx, and so it is helpful to look for some expression in ∫ex36+exdx for which the derivative is also present. We see that 36+ex is part of this integral, and the derivative of 36+ex is □ , which is also present.
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