The answer will be a because they are similar and by law the ratio can be cubed to find ratio of volume
Factorizing an expression involves writing the expression in simpler forms
The values of z are
or 
The equation is given as:

Expand the equation

Factorize the expression:

Factor out z - 4

Split
or 
Solve for z
or 
Hence, the values of z are
or 
Read more about factorization at:
brainly.com/question/11579257
Since theirs no question...
The formula for PT:
a^+b^=c^