×question 4 of 8 sara worked 28 hours last week. joan worked 6 hours less than sara, and erin worked half as many hours as joan. how many hours did sara, joan, and erin work last week?

Joan worked 22 hours, and Erin worked 11 hours. All together (including Sara's hours) they worked 61 hours.

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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