Question

a football is kicked vertically upward from a height of 7 feet with an initial speed of 75 feet per second. the formula h = 7 + 75t - 16t² describes the balls height above the ground h, in feet, t seconds after it was kicked. use this formula to find the balls height 3 seconds after it was kicked. the balls height, 3 seconds after it was kicked, was feet.

Explanation:

Step1: Substitute t = 3 into formula

$h = 7+75\times3 - 16\times3^{2}$

Step2: Calculate multiplications

$h = 7 + 225-16\times9$
$h = 7 + 225 - 144$

Step3: Calculate sums and differences

$h=(7 + 225)-144$
$h = 232-144$
$h = 88$

Answer:

88