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Answer: DSet 1: Circles (Beginner)
Explanation
PROBLEM
A circle has radius 7. What is its area? (Express answer as a number times pi)
A circle has radius 7. What is its area? (Express answer as a number times pi)
A.
14pi
B.
56pi
C.
7pi
D.✓ Correct
49pi
Detailed Explanation
Choice D is the best answer. Area = pi times r squared = pi times 7 squared = 49pi
Why others are wrong:
A: 14pi is incorrect because it does not satisfy the equation.
B: 56pi is incorrect because it does not satisfy the equation.
C: 7pi is incorrect because it does not satisfy the equation.