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:
26 minutes and 40 seconds
Step-by-step explanation:
The answer to the problem is 5
Answer:
On a number line, negative five and positive five are the same distance from zero.
Step-by-step explanation: