# Math Help - Rocket Launched

1. ## Rocket Launched

A small rocket is launched from a height of 72 feet. The height of therocket in feet,
h, is represented by the equation h(t) = –16t2 + 64t + 72, where t = time, in seconds. Graph this equation.

Use your graph to determine the number of seconds that the rocket will remain at or above 100 feet from the ground.

2. Originally Posted by magentarita
A small rocket is launched from a height of 72 feet. The height of therocket in feet,
h, is represented by the equation h(t) = –16t2 + 64t + 72, where t = time, in seconds. Graph this equation.

Use your graph to determine the number of seconds that the rocket will remain at or above 100 feet from the ground.

You have to draw 2 graphs:

1. $h(t) = -16t^2+64t+72$ and

2. $y = 100$

The period of time you are looking for is represented by the distance between the 2 intersections of these 2 graphs.

3. ## Excellent....

Originally Posted by earboth
You have to draw 2 graphs:

1. $h(t) = -16t^2+64t+72$ and

2. $y = 100$

The period of time you are looking for is represented by the distance between the 2 intersections of these 2 graphs.