Question 79964
321=-16t^2-2t+524
-16t^2-2t+524-321=0
-16t^2-2t+203=0
using the quadratic equation we get:
t=(2+-sqrt[-2^2-4*-16*203])/2*-16
t=(2+-sqrt[4+12992])/-32
t=(2+-sqrt12996)/-32
t=(2+-114)/-32
t=(2+114)/-32
t=116/-32
t=-3.625 not the answer.
x=(2-114)/32
t=-112/-32
t=3.5 seconds is the answer.