During halftime of a football ​game, a sling shot launches​ T-shirts at the crowd.A​ T-shirt is launched from a height of 6 feet with an initial upward velocity of 80 feet per second. Use the equation h(t)=-16t^2+80t+6, where t is time in seconds and ​h(t) is height. How long will it take the​ T-shirt to reach its maximum​ height? What is the maximum​ height?

1 answer

To find the time it takes for the T-shirt to reach its maximum height, we need to find the vertex of the parabolic equation h(t)=-16t^2+80t+6. The vertex represents the maximum point of the parabola.

We can find the t-coordinate of the vertex using the formula t=-b/2a, where a=-16 and b=80:

t = -b/2a = -80/(2(-16)) = 2.5

So the T-shirt reaches its maximum height at t=2.5 seconds.

To find the maximum height, we need to evaluate h(2.5):

h(2.5) = -16(2.5)^2 + 80(2.5) + 6 = 106 feet

So the T-shirt reaches a maximum height of 106 feet above the ground.