Concept explainers
(a)
The
Answer to Problem 9.1P
The
Explanation of Solution
Given:
Town has
Each home generates
Space available in the local landfill is
Time period is
Calculation:
Write the expression to calculate the annual waste tonnage.
Here, annual waste tonnage is w.
Substitute
Calculate the duration when the landfill will get filled.
Here, the duration is t.
Write the expression to calculate the cost incurred up until the landfill reaches its capacity.
Here, the cost incurred on landfill is c.
Substitute
Write the expression to calculate the cost for sending the waste to a remote landfill.
Here, the cost for sending the waste to remote landfill is x.
Substitute
Calculate the total cost with interest.
Here, the total cost is y.
Substitute
Write the expression to calculate the average cost for
Here, the average cost is a.
Substitute
Conclusion:
Thus, the average annual cost is
(b)
The total cost per home.
Answer to Problem 9.1P
The cost per home is
Explanation of Solution
Write the expression to calculate the total cost per home.
Here, total cost per home is q.
Calculate the number of homes.
Substitute
Conclusion:
Thus, the cost per home is
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