10 laps around each day. each lap is 400 meters. how many days will it take to run 12 kilometers

3 days.

12 kilometers is 12,000 meters. 10 laps each day would be 4000 meters everyday.

first day : 4000 meters

second day : 8000 meters

third day : 12,000 meters

she would want to sell 10 full-year subscriptions and at least 9 half-year subscriptions to get a total of at least $300. 

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