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## anonymous 3 years ago A circle has a diameter of 8 millimeters. What are the circumference and area of the circle? Use three point one four for pi. Round to the nearest tenth.

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1. anonymous

Circumference: 25.1 mm Area: 50.2 mm To find the circumference, remember to use th formula: $C = \pi x d$ (which can also be $C = \pi x 2r$ ) To find the area, remember to use the formula: $A = \pi x r^2$

2. anonymous

Thank you

3. anonymous

Each year, Terrell buys a plane ticket to visit his grandmother for a week. Last year, he paid one hundred thirty dollars. This year, he paid one hundred sixty-nine dollars. What was the percent increase in the cost of his plane ticket? Show your work.

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