# Correct 375 points out of 375 question 26 incorrect

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Question25miles per hour, how many minutes will it take him to get to the community center?Correct3.75 points outof 3.75Question26Incorrect0.00 points outof 3.75The community center is 4 miles away from George’s house. If he rides his skateboard to the center, and he is traveling at an average rate of 5miles per hour, how many minutes will it take him to get to the community center?Select one:a. 20 minb. 48 minc. 75 mind. 8 mine. None of the aboveThe correct answer is: 48 min
Select one:a. b. c. d. The correct answer is:
4/18/2018Graded Midterm Exam18/25Question+ 2y= 10, find dy/dx by implicit differentiation.3
Correct3.75 points outof 3.75Questionft/sec crosses the intersection. If the roads are at right angles to each other, how fast are the car and the truck separating 2 seconds after thetruck crosses the intersection?a. −4 ft/secb. 14 ft/secc. 50 ft/secd. 68 ft/secThe correct answer is: 14 ft/sec
Correct3.75 points outof 3.75Given 5x+ 2y= 10, find dy/dx by implicit differentiation.3
A car traveling at a rate of 30 ft/sec is approaching an intersection. When the car is 120 ft from the intersection, a truck traveling at a rate of 40ft/sec crosses the intersection. If the roads are at right angles to each other, how fast are the car and the truck separating 2 seconds after thetruck crosses the intersection?Select one:a. −4 ft/secb. 14 ft/secc. 50 ft/secd. 68 ft/secThe correct answer is: 14 ft/sec
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4/18/2018Graded Midterm Exam19/25Question29Correct3.75 points outof 3.75Question30Consider the function y = x− 3x + 5.At what value of x is the slope of the tangent line equal to 7?2Incorrect0.00 points outof 3.75
4/18/2018Graded Midterm Exam20/25Question31Incorrect0.00 points outof 3.75Question32If a closed tin can with a volume of 16π inis to be in the form of a right circular cylinder, what is the radius if its surface area is a minimum?3Correct3.75 points outof 3.75
Select one:a. b. c. 2 in.d. 8 in.The correct answer is: 2 in.
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