5
Answer: DSet 2: Circles (Beginner)
Explanation
PROBLEM
A circle has radius 5. What is its area? (Express answer as a number times pi)
A circle has radius 5. What is its area? (Express answer as a number times pi)
A.
10pi
B.
5pi
C.
30pi
D.✓ Correct
25pi
Detailed Explanation
Choice D is the best answer. Area = pi times r squared = pi times 5 squared = 25pi
Why others are wrong:
A: 10pi is incorrect because it does not satisfy the equation.
B: 5pi is incorrect because it does not satisfy the equation.
C: 30pi is incorrect because it does not satisfy the equation.