So keep in mind a negative minus a negative is the same as a negative plus a positive. For example -9-(-7) is the same as -9+7 because the 2 minuses cancel each other. So all you have to do is -9 + 7 = -2. If you’re confused, try looking on a number line and count it.
-circumference is equal to pi×diameter, area is equal to pi×radius^2 -28.26÷3.14=9, 9÷2=4.5, 4.5×4.5=20.25, and 20.25×3.14=63.585 -rounded to the nearest hundredth, the answer is 63.59
