Answer:it is c and d
Step-by-step explanation:
D. The answer has to be 2,000, eliminating A and C. B doesn't even use the original equation, as well as incorrectly solving the method, so D is the correct answer, even if you don't understand the principles.
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If the diameter is 14
the radius should be 7
for the circumference is 44 units
the area is 154 square units