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OpenStudy (anonymous):
An object is dropped from the top of a 100-m tower. its height above ground after t sec is 100-4.9t^2 m. How fast is it falling 2 sec after it is dropped?
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OpenStudy (lgbasallote):
is this a calculus class or algebra?
OpenStudy (anonymous):
Calculus
OpenStudy (lgbasallote):
okay... take the derivative of 100 - 4.9t^2 what do you get?
OpenStudy (anonymous):
9.8x
OpenStudy (anonymous):
okay thanks i got it now
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OpenStudy (lgbasallote):
-9.8t because your variable is t and there's a minus sign before 9.8
OpenStudy (anonymous):
oh ok
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