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  1. MHB Apprentice

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    #1
    Triangle Construction pays Square Insurance 5980 dollars to insure a construction site for 92 days. To extend the insurance beyond the 92 days costs $97 per day. At the end of this period, if Triangle extends the insurance by 1 day, how much more does Triangle pay for that day than it paid per day during the first period of time?

    Can someone show me how set up to get the answer 32?

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    #2
    I've edited the title of your thread to indicate the nature of the question being asked.

    To find the cost per day for the first 92 days, which we'll call$C_1$, we need to take the total cost and divide by the total number of days.:

    $ \displaystyle C_1=\frac{5980\text{ dollars}}{92\text{ days}}=65\,\frac{\text{dollars}}{\text{day}}$

    Now, to find how much more that 1 additional day costs, we find the difference $D$ between the cost for that additional day and the average cost for the first 92 days:

    $ \displaystyle D=\left(97-65\right)\,\frac{\text{dollars}}{\text{day}}=32\,\frac{\text{dollars}}{\text{day}}$

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