Which equation below give an incorrect value for the function k(x) = 512 ^x

The function k(x)=512x
The value of x is substituted in 512(x)
Any value which doesn't give a specific value of x is wrong.

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's