PLZ HELP FAST how much will it cost to pump one litre of fuel in to the tank what is the unit rate

Alex drew a circle with right triangle prq inscribed in it, as shown below: the figure shows a circle with points p, q, and r on it forming an inscribed triangle. side pq is a chord through the center and angle r is a right angle. arc qr measures 80 degrees.

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

How to use order of operation in 20 divide by 4 multiply 5 = 1