I think it’s 21 not sure because I did 9 more than 4 times which is 9*4 =36 then u subtract 15 less which would be 36-15 which equals 21
If 15 is 20% of her money you need to multiply 15 times 5 to get her total money which is 75 $
Figure C
Appears to be an equilateral triangle.
