Step: 1

[Write the unit rate for 8 fl.oz bottle.]

Step: 2

[Write the unit rate for 12 fl.oz bottle.]

Step: 3

The unit rate of the first one is less than the second one. The first one is a better buy.

Correct Answer is : 8 fl.oz bottle

Step: 1

[Write the rate comparing words to hours.]

Step: 2

[Divide the numerator and the denominator by 4.]

Step: 3

[Simplify.]

Step: 4

The unit rate is 6600 words/hour.

Correct Answer is : 6600 words/hour

Step: 1

1 week = 7 days

[Write the relation between week and days.]

Step: 2

[Write a rate for number of letters to days.]

Step: 3

= 5600÷7 7÷7

[Divide the numerator and the denominator by the denominator.]

Step: 4

= 800 1

[Simplify.]

Step: 5

William receives 800 letters per day.

Correct Answer is : 800 letters/day

Step: 1

1 week = 7 days

[Write the relation between week and days.]

Step: 2

[Write a rate for blinks to days.]

Step: 3

= 28,763÷7 7÷7

[Divide the numerator and the denominator by 7.]

Step: 4

= 4109 1

[Simplify.]

Step: 5

A person blinks his eyes 4,109 times per day.

Correct Answer is : 4,109 blinks/day

Step: 1

1 day = 24 hours.

Step: 2

[Write a rate comparing eye blinks to hours.]

Step: 3

= 4 2 2 4 / 2 4 2 4 / 2 4

[Divide the numerator and the denominator by 24.]

Step: 4

= 176 1

[Simplify.]

Step: 5

Eyes were blinked 176 times in an hour.

Correct Answer is : 176 /hour

Step: 1

[Write a rate comparing cups to minutes.]

Step: 2

= 4 9 ÷ 7 7 ÷ 7

[Divide numerator and the denominator by 7.]

Step: 3

= 7 1

[Simplify.]

Step: 4

The unit rate is 7 cups of apple juice per1 min.

Correct Answer is : 7 cups/minute

Step: 1

[Write a rate comparing number of delivers to the hours.]

Step: 2

= 6 0 / 5 5 / 5

[Divide numerator and denominator by 5.]

Step: 3

= 12 1

[Simplify.]

Step: 4

The unit rate is 12 deliveries per 1 hour.

Correct Answer is : 12 deliveries/hour

Step: 1

Number of miles = 4 miles/hour × 2 hours

[Substitute rate and hours.]

Step: 2

= (4 × 2) miles

[Use Unit analysis.]

Step: 3

= 8 miles

[Multiply.]

Step: 4

Gary walks 8 miles in 2 hours.

Correct Answer is : 8

Step: 1

Average speed = 750 miles/6 hours

Step: 2

= (750 ÷ 6 miles) / (6 ÷ 6 hours) = 125 miles/1 hour

[Divide the numerator and denominator by the GCF, 6.]

Step: 3

Andy drives 125 miles in 1 hour.

Correct Answer is : 125 miles

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