True or false
1. Area refers to the number of square units needed to cover a region.

2. The area of a circle is the product of the square of the radius and pi.

3. The area of a circle is always expressed in square units.

4. Volume is defined as the number of square units needed to cover a closed figure.

5. The formula used to find the volume of a cube is V=l x w x h or V= B x h.