The circumference of a circle varies directly with its radius. if the circumference of a circle with a radius of 1.5 inches is 9.42 in, what is the circumference of a circle with a radius of 9 in? use π = 3.14. round your answer to the nearest inch.

57 in.

Step-by-step explanation:

When two quantities x and y are directly proportional , then the equation to show direct proportion is given  y :-

     (1)

Given : The circumference of a circle varies directly with its radius.

Let c be the circumference of a circle with a radius of 9 in.

If the circumference of a circle with a radius of 1.5 inches is 9.42 in, then from (1) we have

Hence, the circumference of a circle with a radius of 9 in is approximately 57 in.

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step-by-step explanation:

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