Anna is trying to save some money on her electric bill. Her electric company has come up with a new plan designed to charge customers based on when they use electricity. She is trying to decide if the new interval use plan would be better than the standard use plan for her needs. Calculate the monthly costs of both plans if she uses 1,185 kWh of electricity per month with 500 kWh on-peak usage and the rest off-peak usage. Standard Use Plan Interval Use Plan 8. 5 cents/kWh for the first 600 kWh 11 cents/kWh for anything over 600 kWh On-peak hours - 16 cents/kWh Off-peak hours - 4 cents/kWh a. Standard use plan - $64. 35; interval use plan - $80. 00 b. Standard use plan - $115. 35; interval use plan - $107. 40 c. Standard use plan - $64. 35; interval use plan - $107. 40 d. Standard use plan - $115. 35; interval use plan - $80. 00 Please select the best answer from the choices provided A B C D.

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Answer:

B

Explanation:

standard use plan - $115.35; interval use plan - $107.40

This question is about the decision to choose standard use plan or new interval use plan.

Anna needs to evaluate whether she should choose the new interval plan or she should continue with existing standard plan.

Calculation

Anna uses 1,185 kWh of electricity, in which 500 kWh are on peak and 685 kWh off peak.

Standard use Plan : 600 kWh * 8.5 cents / kWh + 585 kWh * 11 cents / kWh = $115.35

Interval Use Plan :500 kWh * 16 cents / kWh + 685 kWh * 4 cents / kWh = $107.4

Answer

The correct answer is b. Standard use plan - $115. 35 ; interval use plan - $107. 40

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