The cost of installing insulation in a particular two-bedroom home is $1080. Present monthly heating cost are $60 but the insulation is expected to reduce heating heating costs by 10%. How many months will it take to recover the cost of the insulation?

Question

anonymous · Answer

please help

anonymous · Answer

If you save 0.1*60 = $6 a month, then how many months will it take to reach $1080?
1080/6 = ?

anonymous · Answer

thats wht I thought is so is it 1080/6= 180?

anonymous · Answer

Yup. So it will take 180 months = 15 years to recover costs. Assuming the energy continues to cost $60 a month for the next 180 months ;)

anonymous · Answer

Thanks!