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h(t)=60t-t^4+1 represents the height of an object with respect to time. what is the height of...

h(t)=60t-t^4+1 represents the height of an object with respect to time.
what is the height of this object after t=5 sec?
find derivative using limits definition?
what is the velocity of the object at t=5 sec?

find the equation of the tangent line to h(t) that is perpendicular to g(t)=-1/40t-36.

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