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Stewart et al - College Algebra 4/e (Homework)

James Finch

Math - College, section 1, Fall 2010

Instructor: Dr. Friendly

Current Score: 0/18

Due: Wednesday, October 6, 2010 22:00 EDT

About this Assignment

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Question
Points
1 2 3 4 5 6 7
0/1 0/3 0/1 0/1 0/3 0/7 0/2
Total
0/18

Description

Here are some textbook questions from College Algebra 4/e by Stewart, Redlin, and Watson published by Brooks/Cole Publishing. 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. 0/1 points All Submissions Notes Question: SColAlg4 1.3.082.
Question part
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A small-appliance manufacturer finds that the profit P (in dollars) generated by producing x microwave ovens per week is given by the formula below provided that 0 x 200.
P = 1/10 x(300 - x)
How many ovens must be manufactured in a given week to generate a profit of $1140?
Enter a number.
Your answer is incorrect.

2. –/3 points Notes Question: SColAlg4 2.4.060.
Question part
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0/1 0/1 0/1
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Consider the following. (Note: The image is not drawn to scale.)

(a) Find an equation for the line tangent to the circle x2 + y2 = 25 at the point (3, -4).
y =


(b) At what other point on the circle will a tangent line be parallel to the tangent line in part (a)?
(
Enter a number.
,
Enter a number.
)


3. –/1 points Notes Question: SColAlg4 3.4.028.
Question part
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0/1
 
A function f is given below.
f(x) = x3
The following transformations are applied to the graph of f (in the given order).
shift downward 1 unit and shift 5 units to the left

Write the equation for the final transformed graph, g.
g(x) =

4. –/1 points Notes Question: SColAlg4 5.2.078.
Question part
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A certain strain of bacteria divides every three hours. If a colony is started with 195 bacteria, then the time t (in hours) required for the colony to grow to N bacteria is given by the following.
t = 3 (log(N/195) / log(2))
Find the time required for the colony to grow to a million bacteria.
t =
Enter a number.
 hours

5. –/3 points Notes Question: SColAlg4 6.3.006.
Question part
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0/1 0/1 0/1
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0/3
 
Use back-substitution to solve the triangular system below.
{(x+y-3z=12,y-3z=7,z=-1)
x =
Enter a number.

y =
Enter a number.

z =
Enter a number.

6. –/7 points Notes Question: SColAlg4 9.1.070.
Question part
Points
Submissions
1 2 3 4 5 6 7
0/1 0/1 0/1 0/1 0/1 0/1 0/1
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Helen deposits $160 at the end of each month into an account that pays 6% interest per year compounded monthly. The amount of interest she has accumulated (in dollars) after n months is given by the sequence below.
I_n = 160((1.005^n -1)/0.005 - n)
(a) Find the first six terms of the sequence.
$
Enter an exact number.
 (first term)
$
Enter a number.

$
Enter a number.

$
Enter a number.

$
Enter a number.

$
Enter a number.
 (sixth term)

(b) Find the interest she has accumulated after 5 years.
$
Enter a number.


7. –/2 points Notes Question: SColAlg4 10.1.004.
Question part
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A race is held and 9 horses are entered.
(a) How many different orders are possible for completing the race?
Enter a number.

(b) In how many different ways can first, second, and third places be decided? (Assume there is no tie.)
Enter a number.

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