Answer: The last member has to finish 11 more laps to complete 50 total laps
Step-by-step explanation:
[tex]\frac{4}{10}[/tex] of 50 = 20
2nd swimmer 8
22% of 50 = + 11
39 laps
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50 - 39 = 11 laps (4th and last swimmer)
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P.S. I think this answer is late now