Aflying disk is thrown into the air from a height of 25 feet at time t= 0. the function that models this situation is h(t) = -16t2 + 75t + 25, where tis measured in seconds and h is the height in feet. what values of the best describe the times when the disk is flying in the air?
a.0 b.0 c. all real numbers
d. all positive integers