<p>1.) Dwayne has a newspaper route for which eh collects k dollars each day. From this amount he pays out k/3 dollars per day for the cost of the papers, and he saves the rest of the money. In terms of k, how many days will it take Dwayne to save $1000?
a. k/1500, b. k/1000m c. 1000/k, d. 1500/k, e. 1500k</p>
<p>For most students, I would recommend you do this by picking a number for k. Let’s try k=6. So Dwayne collects 6 dollars each day, and pays out 6/3=2 dollaers each day. Thus he saves $4 each day. 1000/4=250. So it will take Dwayne 250 days to save $1000.</p>
<p>Now substitute k=6 into each answer choice and eliminate any that do not come out to 250. A, B, C, and E come out incorrect. Thus the answer is choice (D).</p>