Proportionality Review

At the neighborhood Fourth of July party, Mrs. O'Conner plans to serve banana pudding. She plans to make 2 batches for every 9 people attending. If 72 people will attend the Fourth of July party, how many batches does Mrs. O'Conner need to make?

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7.4.D

Find the missing value.

​ ​ ​ (a)  

• 25.2
• 33
• 32.1
• 1.9
• 28.8

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7.4.D

A gear rotates 8 times every 15 seconds. Based on this information, put a check mark next to any true statement below.

• The gear rotates 48 times in 90 seconds.

• The gear rotates 32 times in one minute.

• The gear rotates 16 times in 30 seconds.

• The gear rotates 24 times in 60 seconds.

Answer explanation

The gear rotates 8 times every 15 seconds. So, in one minute (60 seconds), it would rotate 32 times (8*4). Therefore, the statement 'The gear rotates 32 times in one minute' is true. The other statements do not correctly represent the gear's rotation speed.

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7.4.D

A dolphin jumps 54 times in a 6-hour period. At this rate, how many jumps would be expected in a 2-hour period?

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7.4.D

A package of 12 cans of black beans cost $6.84. What is the cost of one can of black beans?

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7.4.D

Michaela spent $234 preparing for a party with 18 guests. Each guest costs the same amount of money. How many guests could attend a party that cost $104 to prepare?

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7.4.D

Use the model to determine the fraction, decimal, and percent that the shaded portion represents.

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7.4.D

Eme is asked to find 15% of the number 60. If Eme knows that 10% is 6, how can Eme use that information to find 15% of 60?

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7.4.D

Fifteen is 30% of what number?

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7.4.D

Of the 650 students at Westmoreland Junior High, 80% will attend the field trip. How many students will attend the field trip?

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7.4.D