Concept explainers
To calculate: The cost in cents of electricity to operate an electric light by evaluating the expression.
Answer to Problem 40WE
The cost of electricity is 0.7125 cents.
Explanation of Solution
Given information:
The expression given to find the cost of electricity to operate an electric light for one hour is
Calculation:
The expression to find the cost of electricity to operate an electric light is
The values given are, p = 75 watts, c = 9.5 cents per kilowatt hour.
By substituting the values of p and c in the expression,
Chapter 1 Solutions
Algebra: Structure And Method, Book 1
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