PLEASE HELP will mark ;)

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83

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?

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122