Mathematics, 17.07.2019 16:20 amp46
more than half of an average home’s energy is used to heat and cool indoor air. if conditioned air escapes, or if the home is made out of materials that easily transfer heat to the outdoors, then the energy used will be wasted. insulation, therefore, is often a good energy investment. insulation is rated by its resistance to conductive heat flow (“r-value”), with higher ratings indicating greater insulating effectiveness. recommended r-values for attic insulation range from r-30 (tropical) to r-60 (alaska). adding attic insulation is touted as having the best payback period of nearly any energy efficiency retrofit. [20 points]
it will cost me $3,000.00 to insulate my attic with r-50 loose-fill insulation. i notice after the insulation that my monthly electricity bill decreased from $300.00 to $200.00. my electricity rate is $0.10/kwh. the market interest rate is 7%. assume both heating and cooling are electric.
1. how much electricity will i save in one year because of my investment (in kwh/year) (2 sig figs)? (10 points)
2. what will be the simple payback of my insulation investment (2 sig figs)? (10 points)
Answers: 3
Mathematics, 21.06.2019 15:30
Aiden drives to school and back each day. the school is 16 miles from his home. he averages 40 miles per hour on his way to school. if his trip takes 1 hour, at approximately what speed does aiden drive home?
Answers: 1
Mathematics, 21.06.2019 15:30
The table below represents a linear function f(x) and the equation represents a function g(x): x f(x) −1 −5 0 −1 1 3 g(x) g(x) = 2x − 7 part a: write a sentence to compare the slope of the two functions and show the steps you used to determine the slope of f(x) and g(x). (6 points) part b: which function has a greater y-intercept? justify your answer. (4 points)
Answers: 3
Mathematics, 21.06.2019 22:30
Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319
Answers: 1
more than half of an average home’s energy is used to heat and cool indoor air. if conditioned air e...
English, 11.02.2021 01:00
Mathematics, 11.02.2021 01:00
History, 11.02.2021 01:00
Biology, 11.02.2021 01:00
Mathematics, 11.02.2021 01:00
Mathematics, 11.02.2021 01:00
Social Studies, 11.02.2021 01:00
Mathematics, 11.02.2021 01:00
Mathematics, 11.02.2021 01:00
History, 11.02.2021 01:00
Mathematics, 11.02.2021 01:00
Mathematics, 11.02.2021 01:00
Computers and Technology, 11.02.2021 01:00