I'm pretty sure the answer is exponent since it tells you how many times to multiply the number beside it by itself.
Example:

It is NOT 3 × 4 = 12
It is 3 × 3 × 3 × 3 = 9 × 3 × 3 = 9 × 9 = 81
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I hope that helps you out!!
Any more questions, please feel free to ask me and I will gladly help you out!!
~Zoey
The formula to find the area of a circle is 2 x r^2
so 2 x 13^2 = 338
15/16 because 1+3=4+11=15 so 15/16 You are very welcome