Two circles have areas of 16 pi and 25 pi . Find the ratio of their circumferences

c=2pir a=pir^2 16pi=pir^2 16=r^2 4=r c=2pir c=2pi4 c=8pi 25pi=pir^2 25=r^2 5=r c=2pir c=2pi5 c=10pi 8pi vs 10pi ratio is 8pi:10pi=4pi:5pi=4:5 ratio is 4:5