Aball is thrown vertically upward. after t seconds, its height h (in feet) is given by the function h(t)=72t-16t^2. what is the maximum height that the ball will reach?
do not round your answer

The maximum height that the ball will reach is 81 ft

Step-by-step explanation:

Note that the tray of the ball is given by the equation of a parabola of negative main coefficient. Then, the maximum value for a parabola is at its vertex.

For an equation of the form

So

the t coordinate of the vertice is:

In this case the equation is:

So

Therefore

Finally the maximum height that the ball will reach is

the car was traveling 40 mph before it started skidding. ( 2 points ) 17. was the driver were her brakes working at 75% efficiency or better? ( 2 points ) yes 29.

step-by-step explanation:

false

step-by-step explanation:

the reason i say this is because for a certain length of sides you can pick any two and the length is wither equal or greater than the third side and in this case it's not.

3 + 5 = 8

8 is smaller than 9 which is the third side.

hope this : )