Answer :
Final answer:
Hazel's race is 20 miles long and Polly's race is 25 miles long.
Explanation:
To find the length of Hazel's race, we can divide 3 miles by 0.15 (since 0.15 represents 15%). This gives us a length of 20 miles for Hazel's race.
To find the length of Polly's race, we can divide 8 miles by 0.32 (since 0.32 represents 32%). This gives us a length of 25 miles for Polly's race.
Learn more about Calculating the length of races based on given percentages here:
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