SOLUTION: The height h in feet of an object after t seconds is given by the function h = –16t2 + 30t + 8. How long will it take the object to hit the ground? Round your answer to the nea

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: The height h in feet of an object after t seconds is given by the function h = –16t2 + 30t + 8. How long will it take the object to hit the ground? Round your answer to the nea      Log On


   

Question 109346: The height h in feet of an object after t seconds is given by the function
h = –16t2 + 30t + 8. How long will it take the object to hit the ground? Round your answer to the nearest thousandth.

Thanks in advance
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
0=-16T^2+30T+8
0=-2(8T^2-15T-4)
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
T=(15+-SQRT[15^2-4*8*-4])/2*8
T=(15=-SQRT[225+128])/16
T=(15+-SQRT353)/16
T=(15+-18.79)/16
T=(15+18.79)/16
T=33.79/16
T=2.112 ANSWER.