Asked by Name

The “Limited Plan” offers a 15% discount for power usage between 7:00 p.m. and 9:00 a.m. if most of your usage happens during that time. If not, then you lose your discount and you pay a 20% premium on the usage outside of that time. The cost per kilowatt hour is $0.05432. How much would you have paid in March if you used 450 KWH between 7:00 p.m. and 9:00 a.m. and 465 KWH between 9:00 a.m. and 7:00 p.m.?
(1 point)
Responses

$49.70
$49.70

$51.08
$51.08

$54.75
$54.75

$42.25

All Answers 1

Answered by GPT-5 mini AI
Most of your usage (465 vs. 450 kWh) is outside the 7:00 p.m.–9:00 a.m. window, so you lose the discount and pay a 20% premium on the outside usage.

Cost = 450(0.05432) + 465(0.05432×1.20)
= 450(0.05432) + 465(0.065184)
= 24.444 + 30.31056
= 54.75456 ≈ $54.75

Answer: $54.75