Bunuel wrote:
Maria works 4 days per week and earns d dollars per day. Which of the following represents the amount Maria earns at this job in w weeks?
(A) 4dw
(B) w/(4d)
(C) 4d/w
(D) 3w/d
(E) dw/4
The conversions we are given are: \(4 \frac{days}{week}\) and \(d \frac{$}{day}\).
We can create a new conversion by multiplying the ones above, and we get: \(4d \frac{$}{week}\).
Finally, we have \(w\) weeks, so the natural thing to do is multiply the conversion above by that to get \(4dw\) in dollars.
Ans: A
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