It’s 14.
The five numbers will be: 12, 13, 14, 15, and 17 so 14 is the median.
She removed 12 marbles because 3×12=36 and you can do commutative property and do 12×3= what? 36!
base = 5
height = 4
hypotenuse = sqrt ( 5^2 +4^2) = sqrt(25+16) = sqrt(41)
5+4 = 9
so perimeter = 9+ sqrt(41)
answer is the 3rd one.
