Answer:
3 lbs
Step-by-step explanation:
7 lbs total
2 + 2 = 4 so we already have 4lbs
7 - 4 = 3
we need 3 more lbs
Answer:
simplifies to 
Step-by-step explanation:
Given expression 
We have to simplify the above expression,
Consider the given expression 
Multiply each term in brackets by
, we get,

Solving further, using
we get,

Thus,
simplifies to 
I believe it would be 482 mm^2 but I could be wrong
it would cost $964
and Im not sure about the volume