Solve the problem.Find the area A and circumference C of a circle of radius 10 ft. Express the answer in terms of ?.

A. A = 400? ft2; C = 10? ft 
B. A = 40? ft2; C = 10? ft
C. A = 100? ft2; C = 20? ft
D. A = 20? ft2; C = 20? ft 


Answer: C

Mathematics

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