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Waner & Costenoble-Finite Math & Applied Calc 8/e (Homework)

James Finch

Math - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 6 / 42

Due : Sunday, January 27, 2030 00:00 EST

Last Saved : n/a Saving...  ()

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Question
Points
1 2 3 4 5 6 7 8 9
0/1 6/6 0/15 –/1 –/1 –/1 –/6 –/6 –/5
Total
6/42 (14.3%)

  • Instructions

    Finite Math and Applied Calculus, 8th edition, by Stefan Waner and Steven Costenoble and published by Cengage Learning is full of relevant, diverse, and current real-world applications. A large number of the applications are based on real, referenced data from business, economics, the life sciences, and the social sciences. Thorough, clearly delineated spreadsheet and TI Graphing Calculator instruction appears throughout the book.

    This demo assignment allows many submissions and allows you to try another version of the same question for practice wherever the problem has randomized values.

    WebAssign provides a wide range of exercises that enable you to:
    • Address student readiness (#1-2: Precalculus Review Questions)
    • Let students self-remediate with question-level help (#3-6: Read Its, Watch Its, Master It Tutorials)
    • Reveal student thinking (#7-9: Standalone Master It Exercises, Expanded Problems)

    The answer key and solutions will display after the first submission for demonstration purposes. Instructors can configure these to display after the due date or after a specified number of submissions.

Assignment Submission

For this assignment, you submit answers by question parts. The number of submissions remaining for each question part only changes if you submit or change the answer.

Assignment Scoring

Your last submission is used for your score.

1. 0/1 points  |  Previous Answers WaneFMAC8 0.3.004. My Notes
Question Part
Points
Submissions Used
1
0/1
1/100
Total
0/1
 
  • This exercise will address student readiness.
  • Precalculus Review Questions target prerequisite algebra concepts that students need to know to master concepts taught in this course.

Convert the expression to positive exponent form. (Do not simplify the expression.)
 
3
4
y−2/3
34​(1y​)(23​)
Incorrect: Your answer is incorrect. webMathematica generated answer key
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2. 6/6 points  |  Previous Answers WaneFMAC8 0.8.002. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6
1/1 1/1 1/1 1/1 1/1 1/1
1/100 1/100 1/100 1/100 1/100 1/100
Total
6/6
 
  • This exercise will address student readiness.
  • Precalculus Review Questions target prerequisite algebra concepts that students need to know to master concepts taught in this course.

Referring to the following figure, determine the coordinates of the indicated points as accurately as you can.
The x y-coordinate plane is given. There are 6 points plotted. Their labels and approximate locations are as follows.
  • P is 3 units left of and 1 unit above the origin.
  • Q is 1 unit left of and 4 units below the origin.
  • R is 1 unit left of and 2 units below the origin.
  • S is 3 units above the origin.
  • T is 2.5 units right of and 3 units below the origin.
  • U is 2 units right of and 0.5 units below the origin.
point P (x, y)
= 
−3,1
Correct: Your answer is correct. webMathematica generated answer key
point Q (x, y)
= 
−1,−4
Correct: Your answer is correct. webMathematica generated answer key
point R (x, y)
= 
−1,−2
Correct: Your answer is correct. webMathematica generated answer key
point S (x, y)
= 
0,3
Correct: Your answer is correct. webMathematica generated answer key
point T (x, y)
= 
2.5,−3
Correct: Your answer is correct. webMathematica generated answer key
point U (x, y)
= 
2,−0.5
Correct: Your answer is correct. webMathematica generated answer key
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3. 0/15 points  |  Previous Answers WaneFMAC8 1.1.058. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
0/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1 –/1
1/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100 0/100
Total
0/15
 
  • This exercise will let students self-remediate with question-level help.
  • Read It links are available as a learning tool under each question so students can quickly jump to the corresponding section of the eTextbook.

The percentage
p(t)
 of children who can speak in sentences of five or more words by the age of t months can be approximated by the equation†
p(t) = 100
1 − 
5.21 × 1017
t12
    (t ≥ 30).
(a) Give a technology formula for p
p(t) =
√45
Incorrect: Your answer is incorrect. 100*(1-(5.21*10^17)/(t^12))

(b) Graph p for
30 ≤ t ≤ 45 and 0 ≤ p ≤ 100.
Select the correct graph.



(c) Create a table of values of p for t = 30, 31, . . ., 40 (rounding answers to one decimal place).
t 30 31 32 33 34
p(t)

t 35 36 37 38 39 40
p(t)

(b) What percentage of children can speak in sentences of five or more words by the age of 32 months? (Round your answer to one decimal place.)
%

(c) By what age are 75% or more children speaking in sentences of five or more words?
months
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4. –/1 points WaneFMAC8 2.3.002. My Notes
Question Part
Points
Submissions Used
1
–/1
0/100
Total
–/1
 
  • This exercise will let students self-remediate with question-level help.
  • Students get just-in-time learning support with Watch It videos that contain narrated and closed-captioned videos walking students through the proper steps to solve a similar problem.

Obtain an exponential function in the form f(t) = Aert.
f(t) is the value after t years of a $8,000 investment earning 7.8% interest compounded continuously.
f(t) =

Need Help? Watch It

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5. –/1 points WaneFMAC8 8.6.013. My Notes
Question Part
Points
Submissions Used
1
–/1
0/100
Total
–/1
 
  • This exercise will let students self-remediate with question-level help.
  • Students get just-in-time learning support with Watch It videos that contain narrated and closed-captioned videos walking students through the proper steps to solve a similar problem.

Weather   Suppose that it snows in Greenland an average of once every 24 days, and when it does, glaciers have a 21% chance of growing. When it does not snow in Greenland, glaciers have only a 2% chance of growing. What is the probability that it is snowing in Greenland when glaciers are growing? (Round your answer to four decimal places.)

Need Help? Watch It

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6. –/1 points WaneFMAC8 7.3.026.MI. My Notes
Question Part
Points
Submissions Used
1
–/1
0/100
Total
–/1
 
  • This exercise will let students self-remediate with question-level help.
  • Master It tutorials are an optional student-help tool available within select questions for just-in-time support. Students can use the tutorial to guide them through the problem-solving process step-by-step using different numbers.

A test requires that you answer first Part A and then either Part B or Part C. Part A consists of 4 true-false questions, Part B consists of 6 multiple-choice questions with one correct answer out of five, and Part C consists of 5 multiple-choice questions with one correct answer out of six. How many different completed answer sheets are possible?

Need Help? Master It

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7. –/6 points WaneFMAC8 8.5.022.MI.SA. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6
–/1 –/1 –/1 –/1 –/1 –/1
0/100 0/100 0/100 0/100 0/100 0/100
Total
–/6
 
  • This exercise will reveal student thinking.
  • Master It tutorials - Standalone (MI.SA) is an embedded, step-by-step tutorial used to help students understand each step required to solve the problem, before inputting their final answer.

This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive any points for the skipped part, and you will not be able to come back to the skipped part.

Tutorial Exercise
Find the conditional probability of the given event when two fair dice (one red and one green) are rolled.
The red one is 5, given that the green one is 5.
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8. –/6 points WaneFMAC8 8.2.060.EP. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5 6
–/1 –/1 –/1 –/1 –/1 –/1
0/100 0/100 0/100 0/100 0/100 0/100
Total
–/6
 
  • This exercise will reveal student thinking.
  • Expanded Problems enhance student understanding by going beyond a basic exercise and asking students to solve each step of the problem in addition to their final answer.

A manufacturer of lie detectors is testing its newest design. It asks 400 subjects to lie deliberately and another 800 to tell the truth. Of those who lied, the lie detector caught 300. Of those who told the truth, the lie detector accused 300 of lying. E is the event that the machine wrongly lets a liar go. Find the following values.
fr(E)
 = N =
What is the relative frequency of the machine wrongly letting a liar go? (Round your answer to two decimal places.)
If E is now the event that the machine falsely accuses someone who is telling the truth, find the following values.
fr(E)
 = N =
What is the relative frequency of the machine falsely accusing someone who is telling the truth? (Round your answer to two decimal places.)
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9. –/5 points WaneFMAC8 9.3.039.EP. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5
–/1 –/1 –/1 –/1 –/1
0/100 0/100 0/100 0/100 0/100
Total
–/5
 
  • This exercise will reveal student thinking.
  • Expanded Problems enhance student understanding by going beyond a basic exercise and asking students to solve each step of the problem in addition to their final answer.

The following chart shows the ages of 250 randomly selected residents of a country.
A graph has a horizontal axis labeled Age and a vertical axis labeled Frequency. The bar graph has 4 bars. Each bar is associated with a label and an approximate value as listed below.
  • 0–14: 70
  • 15–29: 60
  • 30–64: 94
  • 65–74: 26
Determine the (rounded) midpoints of the given measurement classes. (Round your answers to the nearest integer.)
Measurement Class Midpoint
0–14
15–29
30–64
65–74
Use the relative frequency distribution based on the (rounded) midpoints of the given measurement classes to obtain an estimate of the average age (in yr) of a resident in the country. (Round your answer to one decimal place).
yr
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