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Kara is running a marathon. After 2 hours, Kara has run 13 miles. After 4 hours, Kara has run 26 miles. What is her speed, in miles per hour?​

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We can begin by listing the given information:

• Kara ran 13 miles in 2 hours
• Kara ran 26 miles in 4 hours

We can find the unit rate by dividing either of these values:

13 / 2 = 6.5, meaning Kara ran 6.5 miles in an hour.

The same can be applied for the other given values:

26 / 4 = 6.5, which means Kara ran 6.5 miles in an hour.

Answer Recap: Kara’s speed is 6.5 mph (miles per hour).
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