6. The Gateway Arch in St. Louis, Missouri can be approximated by the equation -2x2 + 92 y = 315 880 where x and y are measured in feet. 21 a. How wide is the arch? b. How high is the arch? 7. When a red traffic light turns green, you accelerate at a constant rate to a speed of 60 feet per second, then decelerate steadily to stop at the next traffic light. Your speed, r (in feet per second) is given by r = -10]t – 6|+ 60, where t is the time in seconds. a. How many seconds did it take to reach the second light? b. Your average speed was 30 feet per second. What was the distance between the lights?

6. The Gateway Arch in St. Louis, Missouri can be approximated by the equation -2x2 + 92 y = 315 880 where x and y are measured in feet. 21 a. How wide is the arch? b. How high is the arch? 7. When a red traffic light turns green, you accelerate at a constant rate to a speed of 60 feet per second, then decelerate steadily to stop at the next traffic light. Your speed, r (in feet per second) is given by r = -10]t – 6|+ 60, where t is the time in seconds. a. How many seconds did it take to reach the second light? b. Your average speed was 30 feet per second. What was the distance between the lights?

Algebra: Structure And Method, Book 1

(REV)00th Edition

ISBN:9780395977224

Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Chapter4: Polynomials

Section4.8: Rate-time-distance Problems

Problem 15P

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