Question

Help me pleaseeeeeeeeeeeeee!!!!

Answer 1

okay with what

Explanation:

Answer 2

8.3 seconds

Explanation:

-16t² + 24t + 900 = h

Let h = 0.

-16t² + 24t + 900 = 0

4t² - 6t - 225 = 0

`t = (-b \pm √(b^2 - 4ac))/(2a)`

`t = (6 \pm √((-6)^2 - 4(4)(-225)))/(2(4))`

`t = (6 \pm √(36 + 3600))/(8)`

`t = (6 \pm √(3636))/(8)`

`t = 8.2874`

`t = -6.787`

Answer: 8.3 seconds