I think they both increased by 3 and the new dimensions is 8 ft by 7 ft
The answer is C . cube 2
Explanation:
Using PEMDAS its Parentheses, exponents ,multiple then divide and add , subtract
Steps for multiplying the given binomial and trinomial 
are:
Step 1: 
Step 2: 
Step 3: 
Prime factorization is when the numbers are divided until they cannot be divided anymore.
For example, the number 18.
18/2 = 9
9/3 = 3
So the prime factorization is 2,3,3
As it says use exponents: There are 2 threes. 3 x 3 is the same as 3²
3² x 2 should be your answer
hope this helps
