There a absolute value so mark out the negative and 25 / by 16 is 1 so 1 is your answer if you really do the problem on paper
The answer would be 24pi inches.
You can find this by using the formula for a circumference and plugging in the value of the radius.
C = 2pi*r
C = 2pi * 12
C = 24pi
It is negative because the plot is going down not up
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1. 20,000,000 = 20 million
2. 200,000 = 200 thousand
3. 20,000 = 20 thousand
4. 2 = 2 ones? (I'm not sure about this one)