Lesson 12: Negative Rates | Unit 5: Rational Number Arithmetic

Multiple Choice

In which of the following situations might the quantity of -20 gallons per hour be useful?

• Monitoring water drainage or leakage rates.
• Estimating the amount of paint needed for a wall.
• Calculating fuel consumption rates for a vehicle.
• Measuring the speed of a moving vehicle.

Multiple Choice

Describe a situation where the quantity of -10 feet per minute might be useful.

• The descent rate of a submarine.
• The height of a building in feet.
• The speed of a car on a highway.
• The rate of a tree growing per year.

Multiple Choice

In which of the following situations might the quantity of -0.1 kilograms per second be useful?

• In a vacuum system or material extraction scenario.
• In a weightlifting competition.
• In a cooking recipe for a cake.
• In a swimming pool filtration system.

Multiple Choice

A submarine is only allowed to change its depth by rising toward the surface in 60-meter stages. It starts off at -340 meters. At what depth is it after 1 stage?

• -280 meters

• -400 meters

• -340 meters

• -300 meters

Multiple Choice

A submarine is only allowed to change its depth by rising toward the surface in 60-meter stages. It starts off at -340 meters. At what depth is it after 2 stages?

• -280 meters

• -220 meters

• -180 meters

• -120 meters

Multiple Choice

A submarine is only allowed to change its depth by rising toward the surface in 60-meter stages. It starts off at -340 meters. At what depth is it after 4 stages?

• -100 meters

• -220 meters

• -80 meters

• -340 meters

Multiple Choice

A submarine is only allowed to change its depth by rising toward the surface in 60-meter stages. It starts off at -340 meters. How many stages will it take to return to the surface?

• 5
• 7
• 8
• 6

Multiple Choice

A motor boat traveled -3.4 miles per hour for 0.75 hours. How far did it go?

• 0 miles
• -1.5 miles
• -2.55 miles
• 2.55 miles

Multiple Choice

A tugboat traveled -1.5 miles in 0.3 hours. What was its velocity?

• -5 miles per hour
• -3 miles per hour
• 5 miles per hour
• 0 miles per hour

Multiple Choice

What do you think that negative distances and velocities could mean in this situation?

• Negative distances and velocities suggest movement in the opposite direction from a defined reference point.
• Negative distances suggest a measurement error in the data.
• Negative velocities mean that an object is stationary.
• Negative distances indicate a lack of movement altogether.