# SOLUTION: Mr. Alim's science class launched a toy rocket from ground level with an initial upward velociy of 60 feet per second. The height h of the rocket in feet above the ground after t s

Algebra ->  Algebra  -> Probability-and-statistics -> SOLUTION: Mr. Alim's science class launched a toy rocket from ground level with an initial upward velociy of 60 feet per second. The height h of the rocket in feet above the ground after t s      Log On

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 Question 186049: Mr. Alim's science class launched a toy rocket from ground level with an initial upward velociy of 60 feet per second. The height h of the rocket in feet above the ground after t seconds is modeled by the equation h=60t-(16t)(16t). How long was the rocket in the air before it returned to the ground?Answer by solver91311(16868)   (Show Source): You can put this solution on YOUR website! Your height function is incorrect. What you have is: The correct function, in the form you presented is: Or, in a more traditional form: Now, what you need to know is the value of t, different from 0 (because time 0 is when it left the ground in the first place), when the height will be zero. So just set the right side equal to zero and solve: Factor: Use the Zero Product Rule to get: Which we exclude as previously discussed, or I'll let you finish. Remember to reduce any fractions to lowest terms. John