A car has a wheel with a diameter of 3ft. If it makes 21 rotations, how far will it travel?
197.82
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20
What is the perimeter of the semi-circle?
66.82
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20
The circumference of a circle is 25.12 inches, what is the radius?
4 inches
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15
What is the area of the circle?
78.5
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20
What is the area of the semi-circle?
453.73
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15
What is the area of the circle?
63.585
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25
A floor has a diameter of 20ft. I want to put tile on the entire floor. The cost of the tile is $2.50 per square foot. How much will the entire floor cost?