A circle has a radius of 2.1 inches. The area of the circle is b π square inches, where b

Question

A circle has a radius of 2.1 inches. The area of the circle is b &#960; square inches, where b is a constant. What is the value of b ?

Accepted Answer

The correct answer is 4.41 . The area, A , of a circle is given by the formula A = &pi; r 2 , where r is the radius of the circle. It's given that the area of the circle is b &pi; square inches, where b is a constant, and the radius of the circle is 2.1 inches. Substituting b &pi; for A and 2.1 for r in the formula A = &pi; r 2 yields b &pi; = &pi; 2.1 2 . Dividing both sides of this equation by &pi; yields b = 4.41 . Therefore, the value of b is 4.41 .

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