(a)
The number of hours in one year the light is on.
(a)
Answer to Problem 3SP
The number of hours in one year the light is on is
Explanation of Solution
Given Info: A bulb is switched on for
Write the expression for the total time the light is on.
Here,
Substitute 5 hr for the hours the light is on and 350 for the number of days to find the total time the light is on.
Conclusion:
Therefore, the number of hours in one year the light is onis
(b)
The energy in kilowatt-hour.
(b)
Answer to Problem 3SP
The energy in kilowatt-hour is
Explanation of Solution
Given Info: A bulb is switched on for
Write the expression for the energy.
Here,
Substitute
Conclusion:
Therefore, the energy in kilowatt-hour is
(c)
The energy in kilowatt-hour for a
(c)
Answer to Problem 3SP
The energy in kilowatt-hour is
Explanation of Solution
Given Info: A bulb is switched on for
Write the expression for the energy.
Substitute
Conclusion:
Therefore, the energy in kilowatt-hour is
(d)
The cost of using
(d)
Answer to Problem 3SP
The cost of using
Explanation of Solution
Given Info: The cost of electricity is
Write the expression for the total cost.
Substitute
Conclusion:
Therefore, the cost of using
(e)
The cost of using
(e)
Answer to Problem 3SP
The cost of using
Explanation of Solution
Given Info: The cost of electricity is
Write the expression for the total cost.
Substitute
Conclusion:
Therefore, the cost of using
(f)
The savings made by using
(f)
Answer to Problem 3SP
The savings made by using
Explanation of Solution
Given Info: The cost of electricity is
Write the expression for the savings made.
Substitute
Conclusion:
Therefore, the cost of using
(e)
The savings made by using twenty
(e)
Answer to Problem 3SP
The savings made by using twenty
Explanation of Solution
Given Info: The cost of electricity is
Write the expression for the total savings made.
Substitute
Conclusion:
Therefore, the savings made by using twenty
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