Question

A coin is tossed upward from a balcolny 370 ft high with an initial velocity of 16 ft/sec. during what interval of time?
will the coin be at a height of atleast 50 ft (h= -16t^2 +vot + h0)

is the answer 0>= t<+5

Answer 1

h = -16t^2 + 16t + 370

-16t^2 + 16t + 370 ≥ 50
16t^2 - 16t -320 ≥ 0
t^2 - t - 20 > 0
(t-5)(t+4) > 0

since this makes sense only for t ≥ 0
you would have 0 ≤ t ≤ 5

( your first inequality sign is incorrect)

Answer 2

okay thank you