If you are rounding it will be the same thing
Answer: 4 seconds
Step-by-step explanation:
Given: The function
can be used to model the height of the ball where t is the time in seconds after the ball kicked and h(t) is the height in feet.
Differentiate the given function with respect to t , we get

Put h'(t)=0

Also, 
By second derivative test, h(t) is maximum at t=4.
Hence, the time in Devon which the ball reaches it maximum height = 4 seconds
To explain it in words say. “The answer is 2 because you would first multiply the negative on the inside of the parentheses by the 2 which would give you - (-2). Next, you would multiply the negative on the outside of the parentheses by the -2 inside the parentheses which would give you the answer of 2 because a negative times a negative is a positive.”
I hope this is a good enough explanation.
1/12=x...................