Does 14cm2 mean 14cm squared? Because if it does then each face is 196cm and thats D but then u have to times it by 6 which isnt one of the answers. If 14cm2 is 14x2 then thats 28cm area for each face, so the whole cube is 28x6.
It is nonequivalent. Figure it out this way. Think about what number has to be multiplied by both the numerator and the denominator of to get to . It has to be the samee number for the one expression to be equivalent to the other. To get from 5x to x^3, we have to multiply by 1/5x^2. When we do that we get x^3. Good. Now we have to multiply the denominator by the same thing, 1/5x^2. . As you can see, they are not equivalent.