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Rate is a special kind of ratio, or relationship, between two measurements. There are many different types of rates: for instance, pay rate (dollars per hour), and heart rate (heartbeats per minute). When you see the word “per,” you’re usually talking about a rate.

Another type of rate is speed, the relationship between distance and time. When we say we’re driving 10 miles per hour, we mean: for every hour (time), we cover 10 miles (distance).

Sam drives 50 mph, or 50 miles per hour (mph). At this rate, he will cover 50 miles in 1 hour. How many miles will Sam cover if he drives 2 hours at the same rate?
Question 1 of 10