3%=0.03
You have to move the decimal to the right two times & you get 0.03
First u do a squared +b squared =c squared aka pythagorean theorem then so u already have c squared so you would do 5x5=25 and 13x13=169 so then the equation would be 25+?=169 then do 169-25 which equals 144 and then do the square root of that which is 12 THE ANSWER IS 12
I believe none is the answer due to the fact it isn’t symmetrical. sorry if i am wrong. let me know if i am