Question

The formula is there , help

Answer 1

In this problem all we need to do is plug in the given.

When we analyze the equation (which you did), we see that h represents height and t stands for time. They gave you the time, 4 seconds. When we plug that in we get: $h = 120 \times 4 - 16 \times {4}^{2}$

Simplify:
$h = 480 - 16 \times 16$
$h = 480 - 256$
$h = 144$

The question says that h is the height in terms of feet.

So the answer is 144 feet.