Answer:
a) 25 units
b) 3 seconds
Step-by-step explanation:
a) h= -16t² + 46t + 6
t = 0.5
h = -16(0.5)² + 46(0.5) + 6
h = 25
b) -16t² + 46t + 6 = 0
8t² - 23t - 3 = 0
8t² - 24t + t - 3 = 0
8t(t - 3) + (t - 3) = 0
(8t + 1)(t - 3) = 0
t = -⅛, 3
t = 3 seconds