SOLUTION: An object is thrown vertically upward with a velocity of 96m/sec. The distance S(t) above the ground after t second is given by the formula S(t)= 96t-5t² a. How high will it be

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: An object is thrown vertically upward with a velocity of 96m/sec. The distance S(t) above the ground after t second is given by the formula S(t)= 96t-5t² a. How high will it be      Log On


   

Question 1173126: An object is thrown vertically upward with a velocity of 96m/sec. The distance S(t) above the ground after t second is given by the formula S(t)= 96t-5t²
a. How high will it be at the end of 3 seconds?
b. How much time will it take the object to be 172 m above the ground?
Answer by ikleyn(52776) About Me  (Show Source):
You can put this solution on YOUR website!
.

(a)  substitute t = 3 into the formula and calculate.



(b)  To find this value (values) of t, solve the quadratic equation

         96-5t^2 = 172.