Which of the following statements does not represent a type of energy efficiency?
A)
A house’s outer walls and roof are properly insulated.
B)
Cars consume less gas when the vehicle is increased in weight and sturdiness.
C)
Heat and power are cogenerated.
D)
Timed thermostats are installed to reduce energy use at night.

Gretta needs a $300,000 mortgage and is offered two choices. the monthly payments for the fixed rate and predicted payments for the arm are shown. adjustable rate mortgage year monthly payment 1-15 $1,610.46 adjustable rate mortgage year monthly payment 1-5 $1,520.06 6-15 $1,728.54 what is the difference between the total costs of the mortgages rounded to the nearest hundred? $8,700 $1,700 $15,800 $5,000