If a football player passes a football from 4 feet off the ground with an initial velocity of 36 ft./s, how long will it take the football to hit the ground? use the equation h equals -16 t to the 2nd+6t +4

It will take 0.72s for the football to hits the ground.

Step-by-step explanation:

We have that the equaation for the height of the football is

The football will hit the ground when .

Multiplying by -1

To solve this equation, we need the bhaskara formula:

Given a second order polynomial expressed by the following equation:

.

This polynomial has roots such that , given by the following formulas:

In this problem, we have that:

So

It cannot take negative seconds for the ball to hit the ground.

So it will take 0.72s for the football to hits the ground.

5   1/4   miles per hour

step-by-step explanation:

15   3/4 / 3 = 5   1/4

0.0076, if you meant 4.125 divided by 0.03125 it would be 132

step-by-step explanation:

first you have to move the decimal in 0.03125 over until its behind the 5 which is 5 places over. now the number is 3125

then you have to move the decimal in 4.125, 5 places over. now the number is 4,112,500.

now you divide like you would normally would and get 0.0076