SOLUTION: Could you please help me with this problem. Can you show how to write the equation as well? Thank you! A building is 862 feet tall. Use the function h(t) = 16t2 to approximate

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons -> SOLUTION: Could you please help me with this problem. Can you show how to write the equation as well? Thank you! A building is 862 feet tall. Use the function h(t) = 16t2 to approximate       Log On


   

Question 528830: Could you please help me with this problem. Can you show how to write the equation as well? Thank you!
A building is 862 feet tall. Use the function h(t) = 16t2 to approximate how long it would take an object to fall from the top.
Round to the nearest tenth.
Hint: h is your height
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
A building is 862 feet tall. Use the function h(t) = 16t2 to approximate how long it would take an object to fall from the top.
Round to the nearest tenth.
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I assume you mean the time to hit the ground, h = 0
It falls 862 feet
16t^2 = 862
t+=+sqrt%28862%2F16%29
t =~ 7.3 seconds
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Usually the equation is written as
h%28t%29+=+-16t%5E2+%2B+862