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I am not quite sure but I believe it's the 1st one, B.
80 minutes divide 32 by four, you get 8
Add 8 to 32 to get forty which is the fifth mile then double it 32+8=40×2 =80
Answer:
When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. If you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.
Creds: Eduplace