SOLUTION: Can someone help me with this problem please If a rocket is propelled upward from ground level, its height in meters after seconds is given by h = -9.8t^2 + 88.2. During what in

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Can someone help me with this problem please If a rocket is propelled upward from ground level, its height in meters after seconds is given by h = -9.8t^2 + 88.2. During what in      Log On


   



Question 161580: Can someone help me with this problem please
If a rocket is propelled upward from ground level, its height in meters after seconds is given by h = -9.8t^2 + 88.2. During what interval of time will the rocket be higher than 176.4 m?
a. 3 < t < 6
b. 6 < t < 6
c. 0 < t < 3
d. 6 < t < 9

Answer by oscargut(2103) About Me  (Show Source):
You can put this solution on YOUR website!
I think h=+-9.8t%5E2+%2B+88.2t (you did not put the last t)
you have to solve the following inequality:
-9.8t%5E2+%2B+88.2t+%3E+176.4
then
-t%5E2%2B9t%3E18
then
-t%5E2%2B9t-18%3E0
then
-%28t-3%29%28t-6%29%3E0
then
%28t-3%29%28t-6%29%3C0
then 3%3Ct%3C6
Answer: correct option is a)