Question

A forgetful soul leaves his 100-watt porch light on overnight for 100 days each year. It is on for an additional 11.3 hours each time and the cost of electricity is 10.0 cents/kW-hr. The amount of additional electrical energy he uses = ___ and the total amount of additional money he must pay each year = $____.

Answer 1

Welcome to open study! :)

Answer 2

@Jhannybean thanks so much! could you help me with my problem?

Answer 3

cost of electricity = 10.0 cents/kW-hr (boy, I wish!)

100 watts on for 1 hour = 100 watt-hr
1000 watts on for 1 hour = 1000 watt-hr aka 1 kW-hr (1 kW = 1000 W)
1 watt on for 100 hours = 100 watt-hr

100 watts on for 11.3 hours = 11.3*100 = 1130 watt hours = 1.13 kw hr
10.0 cents = $0.100

Answer 4

@whpalmer4 thanks so much but I already entered that blank (for additional money) as 10.8 and it said that was right

Answer 5

haha a forgetful soul

Answer 6

a stupid soul

Answer 7

an alzheimers soul

Answer 8

@whpalmer4 sorry I entered 11.3 my bad but it still said it was correct