Question

An apple is launched directly upward at 64 feet per second from a platform 80

feet high. The equation for this apple's height h at time t seconds after launch
is h(t) = -16t? + 64t + 80. How many seconds until the apple is 100 feet high?

Answer 1

0.34

Explanation:

you can type this into the calculator too and by going to your table settings you can adjust where it"ll reach 100 or do 100=-16t^2+64t+80 and solve

sorry I am not good at quick maths so I cant do it in my head