The volume of a cube is found by:
1. l x w x h
2. l x w
3. w x h

1)

Step-by-step explanation:

l x w and w x h are all formula for a rectangle, not a cube.

For instance, let's take l x w. If we change the height it will definitely change the volume, but according to 2) it won't. So, 2 is wrong.

We can do the same process for 3) to show it's wrong.

So, the answer is not 2) or 3), so it must be

11.2

step-by-step explanation:

when doing tangent the tangent of the angle is equal to the opposite side from the angle over the adjacent side to the angle.

tan43 = x / 12

move 12 over by multiplying each side by 12

12tan43 = x

x = about 11.2