Lumen OHM Assessment

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Suppose that the cost for manufacturing `n` desks is `C` dollars, so we have `C = f(n)`. Which of the following statements is the best interpretation of `f(2n)`?

The cost, in dollars, for manufacturing `n` desks has been cut in half.
The cost, in dollars, for manufacturing half as many desks.
The number of desks has doubled.
The cost, in dollars, of manufacturing twice as many desks.
The cost, in dollars, has doubled for manufacturing `n` desks.