A ball travels on a parabolic path in which the height (in feet) is given by the expression $-16t^2+64t+31$, where $t$ is the time after launch. What is the maximum height of the ball, in feet?

Respuesta :

Answer:

Maximum height, h(t) = 95 meters

Explanation:

A ball travels on a parabolic path in which the height (in feet) is given by :

[tex]h(t)=-16t^2+64t+31[/tex].............(1)

Where

t is the time after launch

We need to find the maximum height of the ball in feet. For maximum height,

[tex]\dfrac{dh(t)}{dt}=0[/tex]

[tex]\dfrac{d(-16t^2+64t+31)}{dt}=0[/tex]  

[tex]-32t+64=0[/tex]

t = 2

Put the value of t in equation (1) as :

[tex]h(t)=-16(2)^2+64(2)+31[/tex]

h(t) = 95 meters

So, the maximum height of the ball is 95 meters. Hence, this is the required solution.