Question 90608
14=-16t^2+32t ... 0=-16t^2+32t-14 ... 0=-8t^2+16t-7 ... {{{t=(-16 +- sqrt((-16)^2-4(-8)(-7)))/(2(-8))}}} ... {{{t=(-16 +- sqrt(32))/-16}}}


{{{t=(1 +- sqrt(2)/4)}}} ... he was more than 14 ft in the air between these two times


the difference is {{{sqrt(2)/2}}} or approx .707 sec