SOLUTION: A circle has a diameter of 6, an area of b square units, and a circumference of c units. What is the value of b+c?

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Question 382667: A circle has a diameter of 6, an area of b square units, and a circumference of c units. What is the value of b+c?
Answer by kingme18(98) About Me  (Show Source):
You can put this solution on YOUR website!
Recall that the formula for the area of a circle is pi%2Ar%5E2, and the circumference is pi%2Ad.
If the diameter is 6, then the radius is half of that, which is 3. So the area is pi%2A3%5E2=9%2Api, and the circumference is pi%2A6, or 6%2Api. To add these, we have 9%2Api%2B6%2Api=15%2Api