A circle has a radius of 2.1 inches. The area of the bπ circle is square inches, where b is a constant. What is the value of b?
Correct answer: 2 (parsed from the explanation — this source omits an answer key for this item)
Explanation
4.41 =r 2 The correct answer is . The area, A, of a circle is given by the formula A r , r where r is the radius of the circle. It’s given that the area of the circle is b square 2.1 inches, where b is a constant, and the radius of the circle is inches. r 2.1 =r 2 r=r 2.12 Substituting b for A and for r in the formula A r yields b ^ h. r =4.41 Dividing both sides of this equation by yields b . Therefore, the value of b 4.41 is .
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