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Aufmann - College Algebra 6/e (Homework)

James Finch

Math - College, section 1, Fall 2010

Instructor: Dr. Friendly

Current Score: 7/9

Due: Sunday, August 22, 2010 22:00 EDT

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Question
Points
1 2 3 4 5
1 1 3 2 0/2
Total
7/9

Description

Here are some textbook questions from College Algebra 6/e by Richard N. Aufmann, Vernon C. Barker, Joanne S. Lockwood published by Brooks/Cole. Click here for a list of all of the questions coded in WebAssign.


Instructions

This demo assignment allows many submissions and allows you to try another version of the same question for practice.



1. 1/1 points All Submissions Notes Question: AufColAlg6 2.1.026.
Question part
Points
Submissions
1
1
4/50
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1/1
 
Graph the equation by plotting points that satisfy the equation.
2x + y = −4

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2. 1/1 points All Submissions Notes Question: AufColAlg6 2.2.055.
Question part
Points
Submissions
1
1
2/50
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1/1
 
Use the vertical line test to determine which of the following graphs are graphs of functions. (Select all that apply.)


Your answer is correct.

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3. 3/3 points All Submissions Notes Question: AufColAlg6 2.2.074.
Question part
Points
Submissions
1 2 3
1 1 1
2/50 1/50 1/50
Total
3/3
 
An open box is to be made from a square piece of cardboard having dimensions 32 inches by 32 inches (w = 32) by cutting out squares of area x2 from each corner, as shown in the figure.
(a) Express the volume V of the box as a function of x.
V =
Your answer is correct.

(b) State the domain of V.
Enter an exact number.
Your answer is correct. < x <
Enter an exact number.
Your answer is correct.

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4. 2/2 points All Submissions Notes Question: AufColAlg6 2.5.058.
Question part
Points
Submissions
1 2
1 1
1/50 2/50
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2/2
 
Consider the following graph of g(x).
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(a) Use the graph of g(x) to sketch the graph of
y = g(x) − 5
. (Select the correct graph.)

Your answer is correct.


(b) Use the graph of g(x) to sketch the graph of
y = g(x − 1)
. (Select the correct graph.)

Your answer is correct.

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5. –/2 points Notes Question: AufColAlg6 2.7.018.
Question part
Points
Submissions
1 2
0/1 0/1
0/50 0/50
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0/2
 
The data in the table below show the distance, in feet, a ball travels for various swing speeds, in miles per hour, of a bat.
Bat speed (mph) Distance (ft)
40 199
45 211
50 239
60 275
70 296
75 323
80 335
(a) Find the linear regression equation for these data. (Round your coefficients to three decimal places.) (A graphing calculator is recommended.)
y =


(b) Using the regression model, what is the expected distance a ball will travel when the bat speed is 58 miles per hour? (Round your answer to the nearest foot.)
Enter a number.
 ft

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