# Proportions and Electricity

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Proportions and Electricity

Question 1:

Proportions are also a valuable tool in business. If the time it takes to do a task is directly related to the cost the business has to charge for that task, any task can be evaluated for the cost. Set up a proportion and solve it to demonstrate this type of business application. (An example might be 5 hours / \$20 = 10 hours / x). Remember that setting the cross products (multiplications) equal, and then solving for x is the way to solve a proportion.

Question 2:

Equations are used to demonstrate many different things. In the equation C = 0.17x, C stands for cost and x stands for the number of kilowatt hours of electricity a business might use in a month. Determine the cost of electricity for 1,000, 1,500, and 3,000 kilowatt hours of usage. Also, show how C / .17 = x is can be used to determine how many kilowatt hours have been used if you know cost and rate per kilowatt hour (\$0.17). Find an electric bill for your home or apartment and determine the cost per kilowatt hour, or research your power provider for this information. Share your findings with the class.

Duke University

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Anonymous
Thanks, good work

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