3.8-problems

# 3.8-problems - jordan(lj5655 – 3.8 – Arledge –(55100...

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Unformatted text preview: jordan (lj5655) – 3.8 – Arledge – (55100) 1 This print-out should have 7 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points A rock is thrown into a still pond and causes a circular ripple. If the radius of the ripple is increasing at a rate of 5 ft/sec, at what speed is the area of the ripple increasing when its radius is 3 feet? 1. speed = 27 sq. ft/sec 2. speed = 29 sq. ft/sec 3. speed = 31 sq. ft/sec 4. speed = 29 π sq. ft/sec 5. speed = 30 sq. ft/sec 6. speed = 28 π sq. ft/sec 7. speed = 30 π sq. ft/sec 8. speed = 27 π sq. ft/sec 002 10.0 points A point is moving on the graph of xy = 4. When the point is at (1 , 4), its x-coordinate is increasing at a rate of 1 units per second. What is the speed of the y-coordinate at that moment and in which direction is it mov- ing? 1. speed = 6 units/sec, increasing y 2. speed = 5 units/sec, increasing y 3. speed = 4 units/sec, decreasing y 4. speed =- 6 units/sec, increasing...
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3.8-problems - jordan(lj5655 – 3.8 – Arledge –(55100...

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