Math 115 Precalculus Final Exam Assignment

Math 115 Precalculus Final Exam Assignment

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Math 115 Precalculus Final Exam Assignment

Some values for the variables x and y are presented in the table below. If x and y are in a linear relationship, what is the value of y when x = 9?

x 1 3 9 12 y 15 11 −7

y = 0 (b) y = 7

y = 1 (d) y = −1 (e) y = −4

When we talk about a quantity associated with an object or a process, what are we talking about?

Some part of the object or process

Some attribute of the object or process that can be measured

The number of objects present or the number of times the process is repeated

The particular type of object or process being considered

The broadest context in which the object or process makes sense

Suppose a box a crackers is sitting on the kitchen table. Which of the following would be a quantity associated with the box of crackers?

The salt on the crackers

The weight in ounces of the box

Ten boxes of crackers

The cardboard in the box

The kitchen in which the table sits that supports the box

The slope of the line 3x− 4y + 8 = 0 is

m = −4 (b) m = 3 (c) m = 3/4 (d) m = 4/3

(e) m = 8

Suppose the radian measure for an angle is θ = −6π/5. What is the degree measure for this angle?

a = 150◦ (b) a = −216◦

a = 36◦ (d) a = −150◦

(e) a = 216◦

1

Name:____________________________________________________

Problems 6 and 7 refer to the following situation. You decide to rent a car from a company that charges a $25.50 rental fee plus $0.05 per mile for every mile the car is driven.

Which of the following statements are true?

The rate charged per mile driven is a fixed quantity (b) The rental fee is a fixed quantity (c) The cost of renting the car is a fixed quantity (d) Both (a) and (b) are true. (e) Both (b) and (c) are true.

Let d be the miles driven in the rental car, and let c be the cost in dollars of renting the car. Which of the following formulas is correct?.

4d = .054c (b) d = 25.50 + .05c

4c 4d

= .05 (d) Both (a) and (b) are true.

(e) Both (b) and (c) are true.

A particular cookie recipe calls for one cup of flour to start, along with an additional one-half cup of flour for every cup of sugar. Let x represent the amount of flour used (measured in cups) and let y be the amount of sugar used (measured in cups). Which of the following statements is true?

x and y are proportional. (b) 4x and 4y are proportional. (c) The y-intercept is the point (0, 0). (d) Three cups of sugar correspond to 1.5 cups of flour used.

(e) All of the above statements are true.

Problems 9 and10 refer to the following situation. Cole is standing on a level playing field when he throws a ball to Janice. The height H of the ball in feet above the ground s seconds after Cole throws it is given by the function

H = f(s) = 5.5 − 2(s− 1)2

The maximum height of the ball above the ground will be

H = 2 feet (b) H = 5.5 feet

H = 3.5 feet (d) H = 7.5 feet

(e) H = 10 feet

Janice does not catch the ball. How many seconds will pass before the ball hits the ground?

t = 1 seconds (b) t ≈ 2.5 seconds (c) t ≈ 2.66 seconds (d) t = 3 seconds (e) t ≈ 1.87 seconds

Suppose that A is the degree measure for an angle. Which of the following expressions must be equal to sin (A + 720◦)?

sin(−A) (b) −cos(A) (c) −sin(A) (d) cos(A) (e) sin(A)

2

Suppose that b is the radian or degree measure of an angle. As along as all factors are defined, which of the following expressions is equal to

cot(b) cos(b)

csc(b)

cos2(b) (b) 1

sin2(b) (d) tan(b)

(e) cos3(b)

sin(b)

Carlton is drinking a glass of water. When the glass contains 18 mL of water, he places it under the water tap and starts refilling. If 4 mL of water enters flows into the glass every 2.5 seconds, how much water will be in the glass 8 seconds after he started refilling?

12.8 mL (b) 30.8 mL

22.5 mL (d) 10 mL

(e) 38 mL

The implied domain of the function y = f(x) = ln(2x− 1) is the set of

all real numbers (b) all real numbers except x = 0

all real numbers x > 0 (d) all real numbers x > 1/2

(e) all real numbers x < 1

Let a and b be distinct real numbers. Which of the following statements is true about the rational function

y = f(x) = 3(x− b)

(x−a)(x− b)

The function f has a vertical asymptote only at x = a.

The function f has a vertical asymptote only at x = b.

The function f has a vertical asymptote at x = a and at x = b.

The function f has no vertical asymptotes.

The function f has an x-intercept at x = b.

Let u and v be the values of two varying quantities and suppose that u changes at a constant rate of −4.4 with respect to v. Which of the following statements is true? (a) v = −4.4r (b) 4v = −4.44u (c) u = −4.4v (d) 4u = −4.44v

(e) u = v − 4.4

3

Sheryl is riding on a teeter-totter. Suppose θ is the measure of the angle between the ground and Sheryl’s highest point on the teeter-totter, and suppose the bar between Sheryl and the pivot has slope m = 2.8 when Sheryl is at the highest point. Which of the following statements is true?

tan(θ) = 2.8 (b) tan(2.8) = θ

sin(θ) = −2.8 (d) cos(θ) = −1

(e) cos(θ) = 2.8

At practice one afternoon, Jan ran seven laps on a one-half mile track at a constant speed of three miles per hour. Which of the following is a constant quantity in this situation?

the speed in miles per hour that Jan ran (b) the total number of laps that Jan ran

the total time that Jan ran (d) the total hours required to run one lap

(e) all of the above

Suppose that a > 0. If we know that b = ac, then we also know that

b = loga(c) (b) c = logb(a)

a = logc(b) (d) b = logc(a)

(e) c = loga(b)

Let u be the radian or degree measure of an angle. Assuming all factors are defined, which of the following expressions is equal to

sin(u)

csc(u) +

1

sec2(u) + tan2(u)

cot(u) (b) 2 tan2(u)

2 csc(u) + tan(u) (d) tan2(u)

(e) sec2(u)

What is the inverse function for y = f(x) = 1 2

(3x + 5)?

x = g(y) = 1 3 (2y − 5) (b) y = g(x) =

2

3x + 5

y = g(x) = 5 − 2x

3 (d) x = g(y) = 1

2 (3y + 5)

(e) x = g(y) = 5 −y

6

4

Consider the triangle shown in the diagram below. To the nearest tenth, what is the length of Side a?

a ≈ 29.4 inches (b) a ≈ 69.6 inches (c) a ≈ 83.0 inches (d) a ≈ 37.9 inches (e) a ≈ 24.6 inches

Annabeth needs to know the dimensions of a triangular piece of property whose boundaries are shown below. She can measure two sides directly, but unfortunately, one side lies in a lake and cannot be reached. To the nearest tenth of a foot, what is the length of the unknown side?

c ≈ 108.8 feet (b) c ≈ 149.8 feet (c) c ≈ 163.0 feet (d) c ≈ 100.0 feet (e) c ≈ 130.9 feet

Nancy starts eating a bowl of soup at noon, and it takes her twenty minutes to finish. Which of the following is a varying quantity in this situation?

the bowl (b) the weight of soup in the bowl in ounces since noon

the time (d) the total time in minutes that passes while Nancy eats

(e) Nancy

As an ice cube melts, its mass in grams changes at a constant rate with respect to the number of minutes since it began melting Five minutes after the ice cube began to melt, its mass was ten grams. Seven minutes after the ice cube began to melt, its mass was seven grams. What was the constant rate of change?

2 grams per minute (b) −1 gram per minute (c) −1.5 grams per minute (d) 0.7143 grams per minute (e) 1.4 grams per minute

5

Name __________________________________________

Date___________________

Please sign (or type) your name below the following honor statement:

I have completed this final examination myself, working independently and not consulting anyone except the instructor. I have neither given nor received help on this final examination.

 

RUBRIC
Excellent Quality 95-100%	Introduction 45-41 points The background and significance of the problem and a clear statement of the research purpose is provided. The search history is mentioned.		Literature Support 91-84  points The background and significance of the problem and a clear statement of the research purpose is provided. The search history is mentioned.			Methodology 58-53 points Content is well-organized with headings for each slide and bulleted lists to group related material as needed. Use of font, color, graphics, effects, etc. to enhance readability and presentation content is excellent. Length requirements of 10 slides/pages or less is met.
Average Score 50-85%	40-38 points More depth/detail for the background and significance is needed, or the research detail is not clear. No search history information is provided.		83-76  points Review of relevant theoretical literature is evident, but there is little integration of studies into concepts related to problem. Review is partially focused and organized. Supporting and opposing research are included. Summary of information presented is included. Conclusion may not contain a biblical integration.			52-49  points Content is somewhat organized, but no structure is apparent. The use of font, color, graphics, effects, etc. is occasionally detracting to the presentation content. Length requirements may not be met.
Poor Quality 0-45%	37-1 points The background and/or significance are missing. No search history information is provided.		75-1 points Review of relevant theoretical literature is evident, but there is no integration of studies into concepts related to problem. Review is partially focused and organized. Supporting and opposing research are not included in the summary of information presented. Conclusion does not contain a biblical integration.			48-1 points There is no clear or logical organizational structure. No logical sequence is apparent. The use of font, color, graphics, effects etc. is often detracting to the presentation content. Length requirements may not be met
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