Need help trying to find the missing side lengths

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?

The perimeter of a quarter circle is 14.28 miles. what is the quarter circle's radius?

Point q is equidistant from the sides of ∠tsr. find m∠rst.