2a + 4b + 8c = 2(a + 2b + 4c)
You could also continue by factoring the inside of the parentheses a bit:
2a + 4b + 8c = 2(a + 2b + 4c) = 2(a + 2[b + 2c])
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2a+4b
2(a)+4(b)
6(a + b)+8(c)
14(a + b + c)
It is because ''a ,b ,c'' cannot be added, divided and subtracted
8c cubed
Actually, its not just dependent on the cup size...Relatively speaking, for teenage girls, a C cup is average/large, however there are a huge range of other sizes going up to H!! The appearance of a size also depends on the length aroudn your chest, measured in numbers, the smallest I know of is 8, so if you're and 8C its not very big, however if you were to be a 16C it would be very very big, so it all depends on the combination of cup size and chest size.