You can upgrade lighting at your factory to led bulbs that cost $6.95 each and last an average of 5 years. it costs s3 in labor to change a bulb. over a 10-year period. about how much will it cost per year to install led bulbs in 100 lamps and change the bulbs when they burn out?

11.95 dollars

Step-by-step explanation:

Cost of one LED bulb = 6.95 dollars

Cost of changing one bulb = 3 dollars

Life of each bulb = 5 years.

In 10 years, only one time after 5 years the bulbs would have been changed

Hence cost of 100 lamps = 695 and

cost of changing once = 500

Total cost = 1195 dollars for 11 years

Divide this by 10 years to get average cost per year

Cost of 100 lamps per year = 1195/100 = 11.95 dollars

b) 36

step-by-step explanation:

18 times 2 is 36