li - mei thinks she can save money on electricity by changing all her bulbs from incandescent bulbs to…

li - mei thinks she can save money on electricity by changing all her bulbs from incandescent bulbs to fluorescent bulbs. based on the following energy cost table, how much can she save each year if she replaces 8 bulbs? incandescent bulb - 150 hours monthly use $0.05 per hour fluorescent bulb - 150 hours monthly use $0.02 per hour a. $36 b. $432 c. $54 d. $1,008

li - mei thinks she can save money on electricity by changing all her bulbs from incandescent bulbs to fluorescent bulbs. based on the following energy cost table, how much can she save each year if she replaces 8 bulbs? incandescent bulb - 150 hours monthly use $0.05 per hour fluorescent bulb - 150 hours monthly use $0.02 per hour a. $36 b. $432 c. $54 d. $1,008

Answer

Explanation:

Step1: Calculate savings per bulb per hour

The cost per hour of an incandescent bulb is $0.05$ and for a fluorescent bulb is $0.02$. The savings per hour per bulb is $0.05 - 0.02=0.03$ dollars.

Step2: Calculate monthly savings per bulb

Each bulb is used 150 hours monthly. So the monthly savings per bulb is $0.03\times150 = 4.5$ dollars.

Step3: Calculate yearly savings per bulb

There are 12 months in a year. So the yearly savings per bulb is $4.5\times12=54$ dollars.

Step4: Calculate yearly savings for 8 bulbs

If there are 8 bulbs, the total yearly savings is $54\times8 = 432$ dollars.

Answer:

b. $432