SOLUTION: With the given equation: h = 1671 + 6t - 16t^2. When is the object 1661 feet above the ground?

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Question 1143279: With the given equation: h = 1671 + 6t - 16t^2. When is the object 1661 feet above the ground?
Found 2 solutions by josgarithmetic, Alan3354:
Answer by josgarithmetic(39625) About Me  (Show Source):
You can put this solution on YOUR website!
Solve the quadratic equation for h=1661.

-16t%5E2%2B6t%2B10=0
-
8t%5E2-3t-5=0


t=%283%2B-+sqrt%289%2B4%2A8%2A5%29%29%2F16
t=%283%2B-+sqrt%28169%29%29%2F16
t=%283%2B-+13%29%2F16
t=16%2F16
highlight%28t=1%29

check:
1661=1671%2B6%2A1-16%2A1%2A1
1661=1671%2B6-16=1671-10=1661checks.

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
How is the height of the object related to the equation?