A remote control car moves at a constant rate of 600 yards in 6 minutes. How many feet can the car go in 20 seconds?
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A constant rate of 600 yards in 6 minutes is equivalent to 100 yards in 1 minute (divide by 6).
Then 100 yards is equivalent to 300 feet (3 feet = 1 yard). So 100 yards in 1 minute is equivalent to 300 feet in 1 minute.
Next, since 60 seconds is equivalent to one minute, we can write 300 feet in 1 minute as 300 feet in 60 seconds OR 300 feet / 60 seconds
300 feet/60 seconds can be written as a unit rate of 5 feet / 1 second.
Lastly, for 20 seconds, multiply the unit rate by 20: 5 feet * 20 =100 feet in 20 seconds
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