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IM: 7.5.12: Negative Rates (Practice)

Last updated 9 months ago

16 questions

Describe a situation where each of the following quantities might be useful.

1

-20 gallons per hour

1

-10 feet per minute

1

-0.1 kilograms per second

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

1

At what depth is it after 1 stage?

1

At what depth is it after 2 stages?

1

At what depth is it after 4 stages?

1

How many stages will it take to return to the surface?

Some boats were traveling up and down a river. A satellite recorded the movements of several boats.

1

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

1

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

1

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

1

A cookie recipe uses 3 cups of flour to make 15 cookies. How many cookies can you make with this recipe with 4 cups of flour? (Assume you have enough of the other ingredients.)

1

A teacher uses 36 centimeters of tape to hang up 9 student projects. At that rate, how much tape would the teacher need to hang up 10 student projects?

Evaluate each expression. When the answer is not a whole number, write your answer as a fraction.

1

-4\cdot-6

1

-24\cdot\frac{-7}{6}

1

4\div-6

1

\frac{4}{3}\div-24