Answer:
The answer is: 11.2, 13 and 17.4
Step-by-step explanation:
The scale factor of 2 means that we will build a triangle with sides of double lenght than original one.
So sides will be
8 inches
Volume of a cube: side length cubed
x^3=512
Taking the cubic root of both sides, we get
x=8
12
4(x-6)=24
4x-24=24
+24 +24
4x=48
x=12