Answer:
3) 9.2ml
4) .25ml
Have to have 20 characters
Triangles ABC and A'B'C are similar. This means that the corresponding sides are in the same ratio, in this case:

Replacing with data:
Let
x-----------> <span>uniform width surrounding the picture
we know that
(10+2x)*(12+2x)=224-----> 120+20x+24x+4x</span>²=224
4x²+44x+120-224=0
4x²+44x-104=0
using a graph tool-----> to resolve the second order equation
see the attached figure
the solution is
x=2 in
the answer is2 inches