The current options are real, natural, whole, irrational, counterexample, | b |. inequality, integers, and rational.

We are given with the projectile function expressed as h = 32t – 16t2. To get the time of flight, we differentiate the function and then equate to zero. This is equal to dh/dt = 32 - 32t = 0 ; t is equal to 1 second. The total time is twice the first-half time equal to 2 seconds.