3.9 x 3.14 m
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Divide 39 by pi to find the diameter of circle 1 and then subtract four inches from your answer to give the diameter of circle 2.Circle 1 = 39/pi = 12.41408556 inchesCircle 2 = 12.41408556 - 4 = 8.41408556 inches
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The diameter will be 12.41408556 inches
Recall that the circumference of a circle is: C = πd where d is the diamater Let d = 39 m. Then: C = 39π m
Estimate: 3*40 = 120 inches Actual: pi*39 = 122.5 inches to one decimal place