Name:    Lesson 3.4: Using Rates

1.

Select the term to complete the sentence.

A comparison of two quantities measured in different units is called a ______________ .
 a. ratio b. rate c. proportion

2.

Select the unit rate.
 a. 100 m / 10 s c. 45 km/h b. 160 L / 250 people d. 150 beats / 2 min

3.

Calculate the unit rate.

984 km in 12 hours
 a. 82 b. 0.012 km/h c. 98.4 km/h d. 82 km/h

4.

Calculate the unit cost.

5 jars of juice of 14.45
 a. \$2.89/jar b. 2.89 c. \$0.35/jar d. \$5/jar

5.

Calculate the unit cost.

\$21.99 for a 454 g bag of frozen cooked scallops
 a. 0.0484 b. \$20.65/g c. \$0.05/g d. \$5/g

6.

Calculate the hourly rate.

Robert worked 37.5 h and earned \$346.88
 a. \$9.25 b. \$0.11/h c. \$0.93/h d. \$9.25/h

7.

Justine drove 725 km in 8 h. At this rate, about how far will Justine drive in 9.5 h?
 a. 861 km b. 91 km/h c. 1088 km d. 95 km/h

8.

Which is the better price?

2 containers of yogurt for \$0.89    or    9 containers of yogurt for \$4.30
 a. 2 containers of yogurt for \$0.89 b. 9 containers of yogurt for \$4.30

9.

Two different types of tickets are selling for the next big concert. Each hour, one hundred \$55 tickets are sold for seats on the floor. Every two hours, one hundred and fifty \$40 tickets are sold for seats in the stands. Determine the rate of sale for each type of ticket being sold.
 a. floor tickets: \$55/hstand tickets: \$40/h b. floor tickets: 100 tickets/hstand tickets: 75 tickets/h

10.

For the problem in question 9, suppose there are only 375 stand tickets left to sell. How long will it take for these tickets to sell out?
 a. 3.75 h b. 5 h c. 2.1 h d. 3 h