WebAssign is not supported for this browser version. Some features or content might not work. System requirements

WebAssign

Welcome, demo@demo

(sign out)

Saturday, March 29, 2025 01:36 EDT

Home My Assignments Grades Communication Calendar My eBooks

Larson et al - Calculus 8/e (Homework)

James Finch

Math - College, section 1, Fall 2019

Instructor: Dr. Friendly

Current Score : 8 / 14

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

Last Saved : n/a Saving...  ()

Ask Your Teacher Print Assignment
Question
Points
1 2 3 4 5
4/5 1/1 –/3 –/2 3/3
Total
8/14 (57.1%)

  • Instructions

    Here are some textbook questions from Calculus 8/e by Larson, Hostetler, and Edwards published by Brooks/Cole. Click here for a list of all of the questions coded in WebAssign. This demo assignment allows many submissions and allows you to try another version of the same question for practice.

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. 4/5 points  |  Previous Answers Larson8 1.1.008. My Notes
Question Part
Points
Submissions Used
1 2 3 4 5
1/1 1/1 1/1 1/1 0/1
2/50 2/50 2/50 3/50 6/50
Total
4/5
 
Consider the function below and the point P(4,2) on the graph f.
f(x) = sqrt(x)
(a) Graph f and the secant lines passing through the point P(4,2) and Q( x, f(x) ) for x-values of 3, 6, and 7. (Do this on paper. Your instructor may ask you to turn in this work.)

(b) Find the slope of each secant line. (Round to three decimal places.)
slope at x = 3 Correct: Your answer is correct.
slope at x = 6 Correct: Your answer is correct.
slope at x = 7 Correct: Your answer is correct.

(c) Use the results of part (b) to estimate the slope of the tangent line of f at P(4,2).
Correct: Your answer is correct.
(d) What methods could be used to improve your approximation of the slope. (Select all that apply.)
Incorrect: Your answer is incorrect.

Your work in question(s) will also be submitted or saved.
Viewing Saved Work Revert to Last Response
2. 1/1 points  |  Previous Answers Larson8 1.3.086. My Notes
Question Part
Points
Submissions Used
1
1/1
2/50
Total
1/1
 
Find the following limit where f(x) = 9x2 − 9x.
lim_(Deltax->0)(f(x+Deltax)-f(x))/(Deltax)
18x−9
Correct: Your answer is correct.
Your work in question(s) will also be submitted or saved.
Viewing Saved Work Revert to Last Response
3. –/3 points Larson8 1.5.062. My Notes
Question Part
Points
Submissions Used
1 2 3
–/1 –/1 –/1
0/50 0/50 0/50
Total
–/3
 
An L = 23 foot ladder is leaning against a house as shown in the figure below.
If the base of the ladder is pulled away from the house at a rate of v = 5 feet per second, the top will move down the wall at a rate given by the equation below, where x is the distance between the base of the ladder and the house.
r = (v x)/sqrt(L^2-x**2) text( ft/sec)
(a) Find the rate r when x is 6 feet. (Round to two decimal places.)
ft/sec

(b) Find the rate r when x is 12 feet.
ft/sec

(c) Find the limit of r as x L−. (If you need to enter ∞ or -∞, type INFINITY or -INFINITY.)
Your work in question(s) will also be submitted or saved.
Viewing Saved Work Revert to Last Response
4. –/2 points Larson8 3.1.060. My Notes
Question Part
Points
Submissions Used
1 2
–/1 –/1
0/50 0/50
Total
–/2
 
A retailer has determined the cost C of ordering and storing x units of a product is given by equation below.
C = 2 x + 230000/x text(, )1 <= x <= 300
(a) The delivery truck can bring at most 300 units per order. Find the order size that will minimize cost.
units
(b) Could the cost be decreased if the truck were replaced with one that could bring at most 400 units?
    
Your work in question(s) will also be submitted or saved.
Viewing Saved Work Revert to Last Response
5. 3/3 points  |  Previous Answers Larson8 4.3.014. My Notes
Question Part
Points
Submissions Used
1 2 3
1/1 1/1 1/1
1/50 1/50 1/50
Total
3/3
 
Set up a definite integral that yields the area of the region. (Do not evaluate the integral.)
integral over Correct: Your answer is correct.

Correct: Your answer is correct.
4−2x
Correct: Your answer is correct. 		dx
f(x) = 4 - 2x
Your work in question(s) will also be submitted or saved.
Viewing Saved Work Revert to Last Response
Home My Assignments
Enter a number.
Enter a number.
Enter a number.
Enter a number.
Enter a number.
Enter a number.
Enter a number.
Enter an exact number.
Enter an exact number.
Enter an exact number.