The annual mug race is 42 miles long the longest river sailboat race in the world. the event is run along the st. johns river, which is 310 miles long. about how many times as long as the race is the river.

Step-by-step explanation:

So, if we wanna know how many times as long as the race is the river, we just need to use this expression

Where represents the factor that expresses the ratio between both, solving for we have

Therefore, river's length is 7.38 times the race's length, approximately.

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step-by-step explanation: