You are thinking of making your home 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 home has 80 light fittings and 1,500 square feet of uninsulated exterior wall. You can spend no more than $1,600 and would like to save as much per year in energy costs as possible. 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?
You are thinking of making your home 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 home has 80 light fittings and 1,500 square feet of uninsulated exterior wall. You can spend no more than $1,600 and would like to save as much per year in energy costs as possible. 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?
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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Transcribed Image Text:You are thinking of making your home 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 home has 80 light fittings and 1,500
square feet of uninsulated exterior wall. You
can spend no more than $1,600 and would
like to save as much per year in energy costs
as possible. 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?
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