Engineering Economic Analysis

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Problems

6-52 A $78,000 mortgage has a 30-year term and a 9%

A nominal interest rate.(a) What is the monthly payment?

(b) After the first year of payments, what is the out-

standing balance?

(c) How much interest is paid in month 13? How

much principal?

6-53 A $92,000 mortgage has a 30-year term and a 9%

-.nominal interestrate.(a) What is the monthly payment?

(b) After the first year of payments, what fraction of

the loan has been repaid?

(c) After the first 10 years of payments, what is the

outstanding balance?.

(d) How much interest is paid in Month 25? How

much principal?

1 A 30-year mort~~~e for $95,000 is issued at a 9%

JI... nominal interest rate.(a) What is the monthly payment?

(b) How long does i!~e to pay off the mortgage, if

$1000 per month is,paid?

(c) How long does it take to pay off the mortgage, if

double payments are made?

6-55 A 30-year mortgage for $145,000 is issued at a 6%

A-,.. nominal interest rate.(a)What is the monthly payment?

(b)Howlong does it take to payoff the mortgage, if

$1000 per month is paid?

(c)Howlong does it take to payoff the mortgage, if

20% extra is paid each month?

6-56 Solve Problem 6-32 for the breakeven first cost per

AILkilometer of going under the lake.

6-57 Redo Problem 6-38 to calculate the EUAW of the

_-.. alternatives as a function of miles driven per year tosee if there is a crossover point in the decision process.

Graph your results.

6-58 Set up Problem 6-18 on a spreadsheet to make all the

A input data variable and determine various scenarioswhich would make the bailer economical.

6-59 Develop a spreadsheet to solve Problem 6-44. What

A investment in yearis the breakeven cost of the additional primping10?

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