Number of kilowatt-hours Total cost (dollars)

1,250 150.00

1,650 198.00 . A use information to find the unit rate in dorllars for each company. B find a total cost in dollars of buying 2,375 kilowatt-hours.

A. the unit rate of the first company is

150 / 1250 = $0.12 per kilowatt-hour

the unit rate of the second company is

198 / 1650 = $0.12 per kilowatt-hour

They both charge the same amount

B. The total cost of buying 2,375 kilowatt-hours is

(0.12)(2375) = $285

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