Answer:
B
Step-by-step explanation:
sum means addition so n plus 9 would give you the sum of the both
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.
Answer:
24
Step-by-step explanation:
2(10+2)
turns into 2×12
so, that would be 24
