An object is propelled vertically upward from the top of a 224-foot building. The quadratic function s (t) = - 16t^2+128t+225 models the balls height above ground, s (t), in feet, t seconds after it was thrown. How many seconds does it take till the object finnaly hits the ground? Round to the nearest tenth of a second if necessary

Question

Jamie Carson

14 August, 06:42

+3

Answers (1)

Know the Answer?

Jayda Mcdaniel · Answer 1

Set s (t) = 0, its roots are the time the ball had height 0.

use quadratic formula, clearly it was in the air for 0 to t for some positve t value.