Kiara runs 3 miles in 28 minutes. at the same rate, how miles would she run in 42 minutes.

Set this up as a ratio:

3 miles/28 minutes = x miles/ 42 minutes

Solve for x.

X=4.5 miles

Hi there!

This is what is called a porportion problem. 

First we need to label: 

miles           3         x
minutes       28       42 

No we are going to cross multiply. 

28*x and 42*3 

28x=126 

Solve the equation: 

x=4.5 

Therefore, the answer is 4.5 miles. 

Hope this is helpful! If you have any questions, let me know!

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