An 11.0-W energy-efficient fluorescent lightbulb is designed toproduce the same illumination as a conventional 40.0-W incandescentlightbulb. Assuming a cost of $0.116/kWh for energy from theelectric company, how much money does the user of theenergy-efficient bulb save during 140 h of use? (Give your answerto the nearest cent.)
$
