Exam Review Suggestions	

•	Be able to convert values using units in one system (for distance, weight, volume, money) to another system, when given the conversion factors.
•	Given a linear scaling factor, be able to find the corresponding change in area, volume, weight, and pressure.
•	Given the amount by which volume, weight, or area has increased or decreased, be able to find the linear scaling factor.
•	Be able to determine whether a measurement in an application deals with length, surface area, or volume.
•	Use the Consumer Price Index to compare prices of commodities from different years.

Problems

1. You bought your English textbook for $40 in 1997. The earlier edition sold for $37 in 1992.Comparing the converted cost, which book is more expensive? (Assume the 1997 CPI is 160.5 and the 1992 CPI is 40.3.)

2. A furniture company sells a child’s chair that is a scaled down version of their adult-size chair. The seat of the adult-size chair is 225 in2 and the chair weighs 6.5lbs. The seat of the child’s chair is 100 in2 and it is made out of the same material as the adult-size chair. Find the weight of the child’s chair.

3. Coffee costs about $5 per pound in the United States. If a Canadian dollar exchanges for 75 U.S. cents, and a kilogram is about 2.2 pounds, what is the equivalent cost in Canadian dollars per kilogram?

4. A sculpture weighs 140 pounds and is supported by two legs, each of which has a bottom that is 11/2 ft by 1/2 ft. How much pressure do the legs exert on the floor?

5. A house has a surface area of 4000 square yards. A scale model of the house has a surface area of 10 square yards. The height of the front door on the scale model is 0.4 feet. How high is the front door of the house?