<span>The "product line" rule must be used to find out the number of ways that two representatives can be picked so that one is a mathematics major and the other is a computer science major.
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The product line states that if the two functions f(x) and g(x) are differentiable (i.e. the derivative exist) then the product is differentiable and:
(fg)'=f'g+fg'
The answer is Tribunes could veto laws in the Senate.
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When you think of a channel think of trade. Or boats going up and down a stream, a channel is a body of water.
