The function below represents the height, in feet, of the rocket, and t represents the time, in seconds, since the rocket was launched.

h(t) = -16t^2 + 72t + 7

State how long it takes the rocket to hit the ground to the nearest tenth of a second as only a number without units.

4.6.

Step-by-step explanation:

The rocket hits the ground when h(t) = 0. So

Solving a quadratic equation:

Given a second order polynomial expressed by the following equation:

.

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

In this question:

So

Then

Time is a positive measure, so the answer is 4.6.

x/3-10=8

x/3=18

x=48

bull

step-by-step explanation: