I need help on that do you know the answer
I think the answer is 19.46
Answer:
40
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Step-by-step explanation:
The circumference of a circle is equal to the diameter times pi. So, let's look at what happens if you double the radius of a circle -- say from 2 to 4. The area will go from 12.56 to 50.24. This means that it has quadrupled.
