Answer:
150 seconds< 3 minutes
Step-by-step explanation:
a minute is 60 seconds; 60×3 =180
180 seconds is greater than 150 seconds
The toy rocket hits the ground when h(t) = 0.
So, h(t) = 0 = -9t^2 + 81.
Solving the equation,
-9t^2 = -81
Dividing by -9
t^2 = 9
Taking the square root.
t = 3
The answer is 3 seconds.
Answer:
D: Sqrt 13
Step-by-step explanation:
I just did it on edg. 2020