Asked by alex

a coin tossed upward from a balcony 330ft high with an initial velocity of 32/sec. During what interval of time will be the coin be at a height of at least 90ft?
Answered by Scott
it takes a second for the coin to reach max height, 16 ft above the balcony

d = 1/2 a t^2

346 - 90 = 1/2 g t^2

solve for t, add in the 1st second