Answer :
H = 215t - 16.t² or H = -16t² + 215t
97 = -16t² + 215t
-16t² + 215t - 97 = 0
solving this equation genes t' = 12.97 seconds and t" = 0.467??
97 = -16t² + 215t
-16t² + 215t - 97 = 0
solving this equation genes t' = 12.97 seconds and t" = 0.467??