A baseball is thrown from a height of 5 feet. The height, h, of the ball at time t seconds is modeled by the equation h(t)=−16t2+100t+5. How long will it take the ball to reach the ground?

Select one:
a. 5.8 seconds.
b. 6.3 seconds.
c. 7.2 seconds.
d. 7.6 seconds.
please help:)