Question

The Ransoms intend to reduce their electricity use by 15% in September. In August they used 2200 kW x h. Their electricity company charges $0.062 per kW x h for the first 1000 kW x h, $0.055 per kW x h for the next 1000 kW x h, and 40.05 per kW x h for any additional use. How much can the Ransoms expect to save.

Answer 1

$17.15

Explanation:

15% reduction means 100-15 = 85% of the previous

85/100 × 2200

1870 kWh

he saves:

0.055(2000 - 1870) + 0.05(2200 - 2000)

7.15 + 10

$17.15