A ball is thrown downward with a speed of 15 ft/s from the top of a 225-foot-tall building. After t seconds, its height above the ground is given by s(t) = –30t2 – 15t + 225. (a) Determine how long it takes for the ball to hit the ground. sec (b) Determine the velocity of the ball when it hits the ground. ft/sec

A ball is thrown downward with a speed of 15 ft/s from the top of a 225-foot-tall building. After t seconds, its height above the ground is given by s(t) = –30t2 – 15t + 225. (a) Determine how long it takes for the ball to hit the ground. sec (b) Determine the velocity of the ball when it hits the ground. ft/sec

Elementary Algebra

17th Edition

ISBN:9780998625713

Author:Lynn Marecek, MaryAnne Anthony-Smith

Publisher:Lynn Marecek, MaryAnne Anthony-Smith

Chapter10: Quadratic Equations

Section10.4: Solve Applications Modeled By Quadratic Equations

Problem 10.83TI: An arrow is shot from the ground into the air at an initial speed of 108 ft/sec. Use the formula...

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