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Questions and Answers
What is a unit rate?
What is a unit rate?
- A measure of the time it takes to fill a swimming pool
- A measure of the total amount of something
- A measure of the cost of filling a swimming pool
- A measure of the amount of one unit it takes for something to happen in other units (correct)
What is the flow rate of the water hose in gallons per minute?
What is the flow rate of the water hose in gallons per minute?
- 12 gallons per minute
- 10 gallons per minute
- 3 gallons per minute
- 6 gallons per minute (correct)
How many gallons of water have flowed into the pool after 60 minutes?
How many gallons of water have flowed into the pool after 60 minutes?
- 240 gallons
- 420 gallons
- 300 gallons
- 360 gallons (correct)
What is the flow rate of the high-pressure hoses in gallons per minute?
What is the flow rate of the high-pressure hoses in gallons per minute?
What is the purpose of using a unit rate in the context of the swimming pool?
What is the purpose of using a unit rate in the context of the swimming pool?
What is the unit rate of a hose that fills 6 gallon jugs in one minute?
What is the unit rate of a hose that fills 6 gallon jugs in one minute?
What is the average rate of speed if it takes 2 hours to drive 100 miles?
What is the average rate of speed if it takes 2 hours to drive 100 miles?
What does the word 'per' mean in rates?
What does the word 'per' mean in rates?
How did the police officer calculate the unit rate of the driver?
How did the police officer calculate the unit rate of the driver?
What was the driver's unit rate in the example?
What was the driver's unit rate in the example?
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Study Notes
What is a Unit Rate?
- A unit rate is a measure of the amount of one unit it takes for something to happen in other units.
Examples of Unit Rates
- Miles per hour
- Cost per item
- Earnings per year
- Gallons per minute (flow rate of a hose)
Finding the Unit Rate
- Take a defined period of time and measure the output during that time
- Calculate the output per unit of time (e.g., gallons per minute)
- Alternatively, measure how long it takes to do something that has a known quantity (e.g., driving 100 miles in 2 hours)
Unit Rate Example
- If it takes 3 hours to drive 210 miles, the unit rate is 70 miles per hour (210 miles ÷ 3 hours)
- In this example, the unit rate is used to determine if someone was speeding (exceeding the 65 miles per hour speed limit)
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