# Writing Equations from Word Problems : Circumference and Area of Circles.

A stone is thrown into a lake, and t seconds after the splash the diameter of the circle of ripples is t meters

A. Express the circumference C of this circle as a function of t.

B. express the area A of this circle as a function of t.

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#### Solution Summary

Equations involving Circumference and Area of Circles are fond from word problems.

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