The answer is 5.477225575.... or 5.5 if you want the simplified ansewer
Answer:
The dimensions are:
by 
Step-by-step explanation:
The area of the rectangle is given as

The factored form of this quadratic trinomial gives the dimensions of the rectangle.
We factor 3 first to obtain;

We split the middle term to get;

We factor within the parenthesis to get;

We factor further to get;

The dimensions are:
by 
Then the perimeter will be

Answer: 456 inches cubed
Step-by-step explanation:
Volume is the area of the base multiplied by the height so you have to do 38 times 12 to get 456.