The given expressions are
and 
We have to find the sum of the given expressions,

Combining the like terms of both the expressions, we get

=
.
Answer:
229.9
Step-by-step explanation:
C is the correct .................
If we are scaling up the surface area by a factor of 10 means that the two dimensions of area are each being increased by 10 times the original size. Therefore, the surface area is increased by a factor of 10 x 10, or by a factor of 100.