Posted by **LIZ** on Friday, January 28, 2011 at 10:17pm.

You are thinking of making your mansion more energy efficient by replacing some of the light bulbs with compact fluorescent bulbs, and insulating part or all of your exterior walls. Each compact fluorescent light bulb costs $4 and saves you an average of $2 per year in energy costs, and each square foot of wall insulation costs $1 and saves you an average of $0.20 per year in energy costs.† Your mansion has 200 light fittings and 3100 sq ft of uninsulated exterior wall. To impress your friends, you would like to spend as much as possible, but save no more than $850 per year in energy costs (you are proud of your large utility bills). How many compact fluorescent light bulbs and how many square feet of insulation should you purchase? How much will you save in energy costs per year? (If an answer does not exist, enter DNE.)

compact fluorescent light bulbs 1

insulation 2 ft2

total cost $ 3

energy costs savings $ 4 per year

## Answer this Question

## Related Questions

- Probability and Statistics 2 - The University of Southern Mississippi currently ...
- English - 1. There are many fluorescent lights on the ceiling. 2. There are many...
- Math - Daphne replaced light bulbs in her mothers store.She had 3/4 of a box of ...
- Energy question - How would a $10.00 compact fluorescent light bulb (15 W) be an...
- Physics Energy - How would a $10.00 compact fluorescent light bulb (15 W) be an ...
- Chemistry - Describe the spectrum of the light from a fluorescent lamp and from ...
- algebra 1 - On a restaurant sign, 14 light bulbs must be replaced. These light ...
- Probability - A company produces light bulbs, and finds that approximately 2% of...
- Math - A strand of lights had 50 light bulbs. 8 bulbs burned out. Write the ...
- Physic - CFL light bulbs consume less power than their incandescent counterparts...

More Related Questions