Answer:
irrational this is because when you divide - 9 / 4 gives you an irrational answer
A percentage
Have a good dayyyyyy
80p=pr^2+p(2r)^2
80p=pr^2+4pr^2
80=r^2+4r^2
80=5r^2
16=r^2
r=4 for the smaller circle´s radius, and 8 is the larger circle´s radius.
Have a nice day, I hope this was helpful :D
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