Answer:
n = 2
Step-by-step explanation:
In order for the ratio to have a value of 1, the sum of exponents in the numerator must equal the sum of exponents in the denominator:
n + 7 = 9
n = 9 -7 . . . . . . subtract 7 from both sides of the equation
n = 2
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Alternatively, you can simplify the given expression:

Hopefully, it is clear to you that the value of n must be 2 in order to make the numerator equal to the denominator.
It would be 6x + 6y as the final expansion
Answer:
66.7 in³
Step-by-step explanation:
Find the surface area
A = 2.3×2.3×2 + 2.3×6.1×2 + 2.3×6.1×2
Does it have the same area compared to what?