2=1.04^t
t=ln2/(ln1.04)
t=17.673 (approx)
so t=18 (although you will have slightly more than double)
The answer would be B because the sum of the squares of the 2 shorter sides equal the square of the longer side, which is the pythagoream theorem of a^2+b^2=c^2.
12^3 = 1728; 14^3 = 2744;
Wait is it not at all 14.5 or 14 1/2 Because with the math I did I got 14 1/2