Chapter 1-8

Ana is a scuba diver who has completed 5 dives for a total depth of 230 feet. What is the average depth of Ana’s dives in relation to the water’s surface?

• −46 or 46 feet below sea level.
• −1150 or 1150 feet below sea level.
• −225 or 225 feet below sea level.
• −235 or 235 feet below sea level.

Sam says 90 ÷ (-9) = 10. Is he correct? 

• No
• Yes

Which expressions have a quotient of -4? 

• −24 ÷ 6
• −36 ÷ −9
• −72 ÷ −18
• −84 ÷ −21

Andy is scuba diving. He starts at sea level and then descends 10 feet in 2 ½ minutes.  How would you represent Andy’s descent as a unit rate? 

• −4 feet per minute
• 4 feet per minute
• −25 feet per minute
• 25 feet per minute

A catering company loses $110 as a result of a delay. The 5 owners of the company must share the loss equally. Which integer represents the change in profit for each owner?  

• − $22.00 
• $0.20 
• − $0.50 
• $5.00 

Which of the quotients are equivalent to 5? 

• −5 ÷ 1
• −15 ÷ −3
• −15 ÷ 3
• −25 ÷ 5

Terry descends 110 feet in 10 minutes inside a cave. Which of the expressions shows Terry’s change in position from where he was before descending.

• −110 feet ÷ −10 minutes
• 110 feet ÷ 10 minutes
• −10 minutes ÷ −110 feet  
• −110 feet ÷ 10 minutes

Gina is hiking from the top of a mountain. In 24 minutes, she walks down the mountainside to a location 1,524 feet from the top of the mountain. If she walks at about the same pace, express Gina’s average change in altitude per minute.

• −63.5 feet per minute
• 63.5 feet per minute
• 36,576 feet per minute
• 1500 feet per minute

Evaluate each quotient and identify which one is the greatest.

• −30 ÷ 6
• 0 ÷ (−20)
• −44 ÷ −4
• 21 ÷ (−7)

The outside temperature decreases by 7°F in 3½ hours.   How would you represent the temperature change as a unit rate? 

• −2°F per hour 
• 2°F per hour 
• −3.5°F per hour 
• 3.5°F per hour