The equation y = -16t^2 - 60t + 54 describes the height (in feet) of a ball thrown downward at 60 feet per second from a height

Question

3 years ago

15

The equation y = -16t^2 - 60t + 54 describes the height (in feet) of a ball thrown downward at 60 feet per second from a height

of 54 feet from the ground. In how many seconds will the ball hit the ground? Express your answer as a decimal rounded to the nearest hundredth.
Pleeease quickly

Mathematics

1 answer:

Yuliya22 [10] · Answer 1 · 2022-03-31T05:39:30+03:00

Yuliya22 [10]3 years ago

7 0

0 = -16t^2 -60t +54
t = 0.75 seconds
solving by the quadratic equation or graphing calculator or completing the square.