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Tickets to the museum exhibit cost $5.50 for adults and $3 for children. Assume 110 people attended and the museum sold $487.50 worth of tickets. How many adults attended? How many children attended?

For their week at a resort, the Rozin family rented a beach umbrella. They were charged $7 per day for days that were sunny and $2 per day for days that were not sunny. The total rental charge for the week was $39. How many sunny days were in that week?

Joan has a café. Each day, she bakes 24 muffins. She gives away 3 and sells the rest. Each day, she also bakes 36 cupcakes. She gives away 4 and sells the rest. How many muffins and cupcakes does she have at the end of the day?