Let's say your dad is trying to estimate how much it costs to to paint your perfectly SQUARE room. You measure one dimension of the wall in your room and find it measures 10 feet. Use the dimensions and the formula "Area = Length x Width" to estimate the cost since all the color cans only let you know how much it will paint your walls in "area unit." The cost of the paint is $2.50 per square foot of area. How much will it cost to paint the room?
If a circle has the diameter of 8, what is the circumference?
Express 71/1000 as a decimal.