Answer:
6a^2+108a-10ab-180b
Step-by-step explanation:
The answer for this question is Option B : 12.28
The formula of an area of a circle:

r - a radius
We have r = 14m. Substitute:

If you want an approximate area, you can accept 
Then:

Answer:
It is c
Step-by-step explanation:
When you fold it up, it makes a box just like the solid figure.
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Answer:
C
Step-by-step explanation:
84 - (15+13)/4
84 - 28/4
56/4
14