Question

The height of a fireworks rocket launched from a platform can be approximated by h=-5t+ 30t +35, where h is the height in meters and t is the time in seconds. Find the time it takes the rocket to reach the ground after it is launched.​

Answer 1

Explanation:

h=-5t+ 30t +35, where h is the height in meters and t is the time in seconds.

Considering the fact that the launched Rocket will hit the ground, it implies that the height will be zero. Hence the equation will be .

0 =-5t+ 30t +35

-5t+30t = -35

25t = -35

To find t, divide both sides by 25

25t/25 = -35/25

t = - 7/5

t = -1.4secs

Hence the time for the launched rocket to hit the ground will be -1.4secs