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Question
Difficulty Level:

Easy

MCQ

Tom was given this problem:

The side s(t)s({t}) of a square is decreasing at a rate of 2 kilometers per hour. At a certain instant t0t 0, the side is 9 kilometers. What is the rate of change of the area A(t)A(t) of the square at that instant?

Which equation should Tom use to solve the problem?

Select all that apply :

A(t)=[s(t)]2A(t)=[s(t)]^2

A(t)=4s(t)A(t)=4 \cdot s(t)

A(t)=[s(t)]3A(t)=[s(t)]^3

None of the above

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