Two cubes, a and b, are mathematically similar. the height of b is twice the corresponding height of a. the surface area of b is 48 cm^2. find the surface area of a.

Two cubes, A and B
Cube A>LA         surface area of A SA=LA*LA

Cube B> LB=2LA           surface area of B SB=LB*LB=48

SB=LB^2=48>(2LA)^2=48 cm^2
4LA^2=48-->LA=12^(1/2)
surface area of A SA=LA*LA=12 cm^2

the answer is the surface area of A is 12 cm^2

It’s going to be d. 4x^2-4x-19’