Problema Solution
A model rocket is launched with an initial upward velocity of 175ft/s . The rocket's height (in feet) after seconds is given by the following.
h=175t-16t^2
Find all values of for which the rocket's height is 85 feet.
Round your answer(s) to the nearest hundredth.
Answer provided by our tutors
Solution:
85 = 175t - 16t2
16t2 - 175t + 85 = 0
t = (175±√((-175)2 - 4(16)(85))) / 2(16)
t = (175±158.70) / 32
t = 10.43 seconds
t = 0.51 seconds