Question

a football was kicked vertically upward from a height of 4 feet with an initial speed of 65 feet per second. the formula h=4+65t-16t^2 describes the balls height above ground, h, in feet, t seconds after it was kicked. Use the formula to find the ball's height 2 seconds after it was kicked.

Answer 1

70 feet

Explanation:

Given

`h=4+65t-16t^2`

Required

Determine h when t = 2

Substitute 2 for t in the given equation

`h=4+65 * 2-16* 2^2`

Solve all exponents

`h=4+65 * 2-16* 4`

`h=4+130-64`

`h=70`