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.

Step-by-step 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