To mail a package, the rate is 20 cents for the first pound and 5 cents for each additional pound. Two packages weighing 4 pounds and 6 pounds, respectively can be mailed seperately or combined as one package. Which method is cheaper and how much money is saved? Choices.
A) Separately, with a saving of 10 cents
B) Combined, with a saving of 25 cents
C) Combined, with a saving of 20 cents
D) Combined, with a saving of 15 cents
E) Separately, with a saving of 5 cents
4 pounds cost = 20+3*5= 
<gadget id="calculator">20+3*5</gadget>
<output>35</output>
35   6 pounds cost= 20+5*5= 
<gadget id="calculator">20+5*5</gadget>
<output>45</output>
45   Total= 80   10 pounds cost = 20+ 9*5= 
<gadget id="calculator">20+ 9*5</gadget>
<output>65</output>
65 dif. 80-65=15   Answer : Combined, with a saving of 15 cents
<result>D</result>
To mail a package, the rate is 20 cents for the first pound and 5 cents for each additional pound. Two packages weighing 4 pounds and 6 pounds, respectively can be mailed seperately or combined as one package. Which method is cheaper and how much money is saved?