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.
□
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
□□□
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.
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}
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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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?
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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 =□
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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Twenty-five percent of the students at Marcus Garvey Middle School bring their lunches from home. 225 students do not bring their lunch. How many students attend the school? Draw and label a diagram to show the number and percent of each group of students. Homework Help a
QUESTION
The carbon skeleton formula (also called a line formula) shows the carbon-carbon bonds only as lines. Each end or bend of a line represents a carbon atom bonded to as many hydrogen atoms as necessary to form a total of four bonds. Carbon skeleton formulas allow us to draw complex structures quickly. Section 22.3 of your text. The functional group circled is a(n) _______. ANSWER
carboxylic acid
ester
aldehyde
ketone
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Show Examples If f(x) is an exponential function of the form of y=abx where f(5)=5 and f(14)=35, then find the value of f(18), to the nearest hundredth. Answer Attempt 2 out of 2
27.74
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Determine the indefinite integral ∫−6x2e4x3+5dx by substitution. (It is recommended that you check your result rentiation.) Use capital C for the free constant. Answer: □ Hint: Follow Example 7.
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Show Examples If f(x) is an exponential function of the form of y=abx where f(−4.5)=20 and f(1.5)=11, then find the value of f(−4), to the nearest hundredth. Answer Attempt 2 out of 2
16.35
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A variable x is normally distributed with mean 25 and standard deviation 3. Round your answers to the nearest hundredth as needed.
a) Determine the z-score for x=28.
z=□
b) Determine the z-score for x=20.
z=□
c) What value of x has a z-score of 1.33 ?
x=□
d) What value of x has a z-score of 0.3 ?
x=□
e) What value of x has a z-score of 0 ?
x=□
The lengths of mature trout in a local lake are approximately normally distributed with a mean of μ=13.7 inches, and a standard deviation of σ=1.6 inches. Fill in the indicated boxes. Find the z -score corresponding to a fish that is 13.3 inches long. Round your answer to the nearest hundredth as needed.
z=□
How long is a fish that has a z -score of 0.2 ? Round your answer to the nearest tenth as needed.
□ inches
Question
You are given that cos(A)=−53, with A in Quadrant II, and cos(B)=178, with B in Quadrant I. Find cos(A−B). Give your answer as a fraction.
Provide your answer below:
For number 10 and 11 graph the function and identify the domain and range.
10) f(x)=x−3
11) g(x)=x+4 For number 12-13 solve the equation and check your answer.
12) 335x+6=18
A rocket starts from rest with mass m0 and burns fuel at rate k. Find v(t) from m=m0−kt and mdtdv=ck−mg. (a) v(t)=m/sec (b) If fuel is 80% of m0 and lasts 110s, find v(110) with g=9.8m/s2 and c=2500m/s. v(110)=m/sec [Round to nearest whole number]