Rates & Unit Rates Review

A rate is a ratio that compares

• a part to a part.

• a part to a whole.

• quantities with different units.

• quantities with the same units.

A car is going 50 miles per hour. A rate that describes this would have units of

• miles and hours.

• miles and cars.

• hours only.

• miles only.

If you walk to school at a rate of 3 miles per hour, how long will it take you to walk 6 miles?

• 1 hour

• 2 hours

• 3 hours

• 6 hours

A unit rate is a rate in which

• one of the quantities is 1.

• the quantities add up to 1.

• both of the quantities are 1.

• neither of the quantities is 1.

If Cody makes $10 an hour at his after school job, how many hours will it take him to earn $150?

• 1.5 hours

• 10 hours

• 15 hours

• 20 hours

Tyra buys 14 gallons of gas for $35. How could she figure out how much 1 gallon of gas cost her?

• Write the fraction 14 gallons/$35, and divide the top and bottom by 35.

• Write the fraction $35/14 gallons, and divide the top and bottom by 14.

• Write the fraction $35/14 gallons, and multiply the top and bottom by 14.

• Write the fraction 14 gallons/$35, and subtract 35 from the top and bottom.

If 15 books cost $90, what is the unit price?

• $5 per book

• $6 per book

• $9 per book

• $10 per book

An airplane can fly at a rate of 600 miles per hour. How fast does an airplane travel per minute? Remember, there are 60 minutes in an hour.

• 100 miles per minute

• 60 miles per minute

• 10 miles per minute

• 6 miles per minute

The unit price of hot dogs is $0.50/hot dog. How much will 12 hot dogs cost?

• $24

• $12

• $8

• $6

It took Corinne 3 hours to do 12 pages of homework. How many pages of homework did she do per hour?

• 1 page

• 2 pages

• 3 pages

• 4 pages