This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: sakerwalla (hs9229) – HW10 – milburn – (54685) 1 This printout should have 20 questions. Multiplechoice questions may continue on the next column or page – find all choices before answering. 001 10.0 points A circle of radius r has area A and circum ference C are given respectively by A = πr 2 , C = 2 πr . If r varies with time t , for what value of r is the rate of change of A with respect to t equal to the rate of change of C with respect to t ? 1. r = 2 π 2. r = π 2 3. r = 1 2 4. r = 1 5. r = π 6. r = 2 002 10.0 points A point is moving on the graph of 4 x 3 + 5 y 3 = xy. When the point is at P = parenleftBig 1 9 , 1 9 parenrightBig , its ycoordinate is increasing at a speed of 7 units per second. What is the speed of the xcoordinate at that time and in which direction is the x coordinate moving? 1. speed = 14 units/sec , increasing x 2. speed = 40 3 units/sec , decreasing x 3. speed = 40 3 units/sec , increasing x 4. speed = 43 3 units/sec , increasing x 5. speed = 41 3 units/sec , decreasing x 6. speed = 43 3 units/sec , decreasing x 7. speed = 41 3 units/sec , increasing x 8. speed = 14 units/sec , decreasing x 003 10.0 points If the radius of a melting snowball decreases at a rate of 4 ins/min, find the rate at which the volume is decreasing when the snowball has diameter 4 inches. 1. rate = 64 π cu.ins/min 2. rate = 66 π cu.ins/min 3. rate = 62 π cu.ins/min 4. rate = 65 π cu.ins/min 5. rate = 63 π cu.ins/min 004 10.0 points A street light is on top of a 12 foot pole. Joe, who is 6 feet tall, walks away from the pole at a rate of 3 feet per second. At what speed is the tip of Joe’s shadow moving from the base of the pole when he is 12 feet from the pole?...
View
Full Document
 Spring '11
 Millburn
 United States customary units, per capita, Inch

Click to edit the document details