Which units correctly measure is capacity

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

Acircular garden with radius of 8 feet is surrounded by a circular path with a width of 3 feet. what is the approximate area of the path alone? use 3.14 for π

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?