3-18 - 3-18 If the delivery charge for the propane tank...

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3-18. If the delivery charge for the propane tank described in Example 3.3 is $37.50, and the cost of the next largest available tank is $2500 (for a 2.2 cubic meter tank), how long will it take to recover the cost of a larger tank? 3-18. The volume of the new tank in gal is 581, which is almost twice the volume of the initial tank (250 gal). These means that, if the first tank has to be filled twice a month, the second one will have to be filled once a month. Then, the already existent tank, tank 1, will give the following monthly expenses: C (1) 1 2 37.5 75 n =− ⋅
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