
a.
To analysis data on renewable energy.
a.

Answer to Problem 64E
Explanation of Solution
Given information:
The table shows the consumption
Use a graphing utility to find a cubic model for the geothermal energy consumption data and a quadratic model for the wind energy consumption data. Let
Calculation:
Enter the data in calculator.
Press the button STAT and select EDIT
Enter years in
Then cubic regression is
Enter year in
Then quadratic equation is
b.
To analysis data on renewable energy.
b.

Answer to Problem 64E
Explanation of Solution
Given information:
The table shows the consumption
Use the graphing utility to graph the data and the two models in the same viewing window.
Calculation:
Enter the data in calculator.
Press the button STAT and select EDIT
Enter years in
Then cubic regression is
Enter year in
Then quadratic equation is
Data and model are shown as,
c.
To analysis data on renewable energy.
c.

Answer to Problem 64E
Two curves intercept at
Explanation of Solution
Given information:
The table shows the consumption
Use the graph from part
Calculation:
Data and model are shown as,
Two curves intercept at
Both consumptions are equal in beginning of the year
d.
To analysis data on renewable energy.
d.

Answer to Problem 64E
We cannot predict the wind energy in the future.
We can predict the geothermal consumption.
Explanation of Solution
Given information:
The table shows the consumption
Describe the behaviour of each model. Do you think the models can accurately predict consumption of geothermal energy and wind energy in the United States for future years? Explain.
Calculation:
According to the graph wind consumption model does not fit exact data.
So we cannot predict the wind energy in the future.
And geothermal consumption model fit exact data.
So we can predict the geothermal consumption using the model.
Hence, we can predict the geothermal consumption using the model.
we cannot predict the wind energy in the future.
e.
To analysis data on renewable energy.
e.

Answer to Problem 64E
Calculation:
Advantages:
The use renewable energy is sustainable and will never run out.
Disadvantages:
It is difficult to generate the quantity of electricity as large as produced by traditional fossil fuel generators.
Explanation of Solution
Given information:
The table shows the consumption
Use your school’s library, the Internet, or some other reference source to research the advantages and disadvantages of using renewable energy.
Calculation:
Advantages:
The use renewable energy is sustainable and will never run out.
Disadvantages:
It is difficult to generate the quantity of electricity as large as produced by traditional fossil fuel generators.
Chapter 7 Solutions
Precalculus with Limits
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