Question

PLEASE, I NEED YOUR HELP. IT WOULD BE REALLY NICE IF SOMEONE HELPS ME PLEASE CAUSE I NEED AN ANSWER SO PLEASEEEEEEEEEE.

A baseball is thrown into the air from the top of a 224-foot tall building. The baseball's approximate height over time can be represented by the quadratic equation h(t) = -16t^2 + 80t + 224, where t represents the time in seconds that the baseball has been in the air and h(t) represents the baseball's height in feet. When factored, this equation is h(t) = -16(t - 7)(t + 2).

What is a reasonable time for it to take the baseball to land on the ground?

A. 9 seconds
B. 7 seconds
C. 2 seconds
D. 5 seconds

Answer 1

You are given the factored equation so solve for each t for 0:

(t - 7) = 0

t = 7

(t+2)=0

t = -2

The answer can't be negative, so it needs to be the positive answer which is 7.

The answer is B. 7 seconds.