1. Lesson 4-1 Ratios, Rates and Unit Rates
Obj: The student will be able to work with rates and ratios HWK: p – 9 all, 22(journal entry) Vocab: 1) rate 2) unit rate 3) unit price 4) average rate of speed

2. Ex 1) Miki can type 120 words in 3 minutes
Ex 1) Miki can type 120 words in 3 minutes. How many words can she type per minute?

3. Ex 2) Henry earned $126. 50 for 23 hours of work
Ex 2) Henry earned $ for 23 hours of work. What was his pay per hour?

4. Density is measured in units of mass per unit of volume (this is a unit rate)
Ex 3) Four cubic meters of silver has a mass of 41,960 kilograms. What is the density of silver?

5. Ex 4) Aluminum weighing 1350 kilograms has a volume of 0
Ex 4) Aluminum weighing 1350 kilograms has a volume of 0.5 cubic meters. What is the density of aluminum?

6. Ex 5) A band’s tour bus is traveling 525 miles from Charlotte, North Carolina to Orlando, Florida.
In the first 5 hours of the trip, the bus travels 260 miles. What is the bus’s average speed?
The driver estimates that the entire trip will take 8 hours. If the bus keeps traveling at the same average speed, is the driver’s estimate reasonable? Explain.

7. Ex 6) Annie can buy a 16 oz box of cereal for $5
Ex 6) Annie can buy a 16 oz box of cereal for $5.49 or a 20 oz box for $5.99. Which is the better buy?