Focus on the difference between feasible alternatives (Principle 2LOADING...

)! Insulated concrete forms(ICF) can be used as a substitute for conventional wood framing in building construction. Heating and cooling bills will be about 50% less than in a similarwood-framed building in upstate New York. An ICF home will be approximately 10% more expensive to construct than awood-framed home. For a typical 2,200 ft2 home costing $170 ft2 to construct in upstate New York and costing $220 per month to heat andcool, how many months does it take for a 2,200 ft2 ICF home to pay back its extra constructioncost?

It will take ____ months to pay back the extra ICF construction cost through monthly energy savings. (Round to the nearest wholenumber.)