Question 1047374
-5t^2+15t+2=12, and the longest time period is the value we want (there are two solutions)
-5t^2+15t-10=0
divide by -5
t^2-3t+2=0
(t-2)(t-1)=0
t=1,2 seconds.
t=2 seconds when it is on its way down at 12 meters above the ice.
{{{graph(300,300,-5,5,-10,20,-5x^2+15x+2)}}}