Answer:
A) 48
B) 3 seconds
Step-by-step explanation:
A) -16+40+24 = 48
B) -16t² + 40t + 24 = 0
2t² - 5t - 3 = 0 (÷ by -8)
2t² - 6t + t - 3 = 0
2t(t -3) + 1(t - 3) = 0
(t - 3)(2t + 1) = 0
t = 3, t = -½
