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Step-by-step explanation:

 560 miles

= 11 bikers who ride 50 miles each, plus one more biker,

50 miles/biker                  who rides only 10 miles (from 550 to 560 miles)

In a team bike race, a biker must ride exact 50 miles.

If they need to achieve 560 miles, the number of bikers should be a positive integer (b) which is equal or larger than: 560/50 = 11.2. => The answer should be b > 11 or b>=12.

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where is the page?

step-by-step explanation:

72 is the answer to this problem