Answer: 6x - 3 over x^3
Step-by-step explanation:
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153.86 is the answer because the formula is Pi times radius squared. So, the equation would be 3.14X7^2=3.14X49=153.86
If u do a google image search, ur answer will pop right up. It would also tell u how to do it. That's what I usually do when I'm having troubles on math.
87.41898806% or 87% is what i got