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Exam 2 Spring 2012 - Answers Key M114 Spring 2012 E xam II...

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M114 Spring 2012 Exam II Version: One Dot Colors: Pink or Green 1. c 2. B 3. A 4. B 5. E 6. c 7. c 8. D 9. B 10. c 11. D 12. B 13. c 14. A Answers Key M114 Spring 2012 Exam II Version: two dots Colors: Yell ow or Blue 1. E 2. A 3. c 4. D 5. A 6. B 7. E 8. A 9. D 10. A 11. c 12. c 13. E 14. B
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MATH114-Spring 2012 EXAM II .. Page J6 Name: Section: ----------------------------------------------- ----- Instructor: ---------------------------------------------- Please show all work to receive credit. 15. ( 10 Points) The Grand Canyon Skywalk is located 4000 feet above the floor of the Grand Canyon. Use the position equation to answer the following questions: s = -16t 2 + v 0 t + s 0 a. If a tourist accidentally dropped his camera over the side of the skywalk, how long would it take to hit the canyon floor? Round to 1 decimal place, with t in seconds : s = -16t 2 + +4000 : 0 = -16t 2 + +4000 : 16t 2 = 4000 ·, t 2 = 4000 · t = 15.8 seconds 16 ' b. What is the height of the camera after 12 seconds? s = -16(12 2 ) + 4000 = 1696 the height
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