There are Horseback Riding Lessons. Last year, the 8 kids in a beginner's horseback-riding group were 7, 9, and 10 years old. The mode of the ages was 10, and the mean was 9. There were equal numbers of 7-year-olds and 9-year-olds. This year the group has stayed together. How many are there of 11 years old?

The ivring berlin learning center would like a possible net profit of $650,000 on its new resource manual it sells to schools. the fixed costs for producing the manual are $780,000 and the variable cost per package is $19.85. if the estimated unit sales are 1,250,000 units, what selling price unit should the ivring berlin learning center try?