The measure of aoc is 90 find the value of m

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

Can someone tell me if this is perpendicular? !

Technicians have installed a center pivot, circular irrigator for a farm that covers 25 acres. a.) how long is the irrigation boom (in feet) from the center pivot to its farthest extent? b.) if the irrigation boom makes 4 full revolutions in a day, how many miles does the end of the boom travel in 5 days?