2. Janice is buying paint to paint her new apartment. The store sells paint in one-gallon cans. How accurate does her estimate need to be for the amount of paint needed?

3. A city planner is measuring the distance of one city block. Which unit of measure should she use: 1 mile, 1 meter, inch?

2. Janice should know the area of her apartment that requires painting. This should be followed by calculating the area that 1 gallon of the paint can completely paint. Dividing the total area of the apartment to be painted with the area painted by a single gallon can will determined the number of gallon cans to buy for the apartment painting.

3. The approximate distance covered by 20 blocks is 1 mile. This is an example of Manhattan. A city planner can use this estimate to know the distance of a single city block by dividing 1 mile with 20 blocks. She can use 1 mile.