Use the formula h = 40t - 5t² to find the height in meters of a ball 5 seconds after it is thrown

Question

Someone please help me figure this out. Ik it's not that hard but I feel like my answers wrong! Just let me know how you got your answer!!! 

Answer 1

h(t) = 40t - 5t²

This is height as a function of time.

To find the height after 5 seconds just replace t with 5.

 

h(5) = 40(5) - 5(5)²

h(5) = 200 - 5(25)

h(5) = 200 - 125

h(5) = 75 meters