It is assumed that there is a building of 100 square meters with a door &window area of about 30 square meters. The heat protection performanceof high-performance doors & windows is better than that of ordinary doors& windows.Assumptions 1: If turn on the air conditioner, the power consumption ofusing ordinary doors & windows is 30 kWh/day; while the powerconsumption of using high-performance doors & windows is 25 kWh/day.Assumptions 2: The electricity price is 0.1 $/kWh.Assumptions 3: The investment cost of ordinary doors & windows andhigh-performance doors & windows is 200 $/m2 and 150 $/m2,respectively.Questions: How much is the cost saved by using high-performance doorsand windows for each year? What is the payback period of investing high-performance doors & windows?

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Answered: Questions: How much is the cost saved…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Section 3.3 (55) Your pension plan is an annuity with a guaranteed return of 4% per year (compounded quarterly). You can afford to put$1,200 per quarter into the fund, and you will work for 40 years before retiring. After you retire, you will be paid a quarterly pension based on a 25-year payout. How much will you receive each quarter?
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An Individual Retirement Account (IRA) is an account in which the saver does not pay income tax on the amount deposited but is not allowed to withdraw the money until retirement. (The saver pays income tax at that point, but his or her tax bracket is much lower then.)Marlene Silva wishes to have an IRA that will be worth $100,000 when she retires at age 65. (Round your answers to the nearest cent.) (a) How much must she deposit at age 39 at 8 3/8% compounded daily? $ (b) If, at age 65, she arranges for the monthly interest to be sent to her, how much will she receive each thirty-day month?
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For the cash flows shown in the diagram, determine the value of x and 2x that will make the future worth in year 14 equal to $275,000. i = 10% per year 2 3 4 5 6 7 8 2x 2x 2x 2x The value of x is determined to be $ The value of 2x is determined to be $
QUESTION: You have a credit card on which you currently owe $10,000. The card has a 19.99% annual interest rate and requires a minimum monthly payment of $200. Assume that you do not incur any other purchases on the card. Part 2: If you double the minimum payment, how long will it take you to pay off the card? How much total interest will you pay? How much interest cost will you save between (a) and (b)? Part 3: If you pay $100 per month, how long will it take you to pay off the card? Explain
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Questions: How much is the cost saved by using high-performance doors and windows for each year? What is the payback period of investing high- performance doors & windows?