Engineering Economics
What is defined as the investment of loan or principal which is based not only on the original amount of the loan or principal but the amount of loaned or principal plus the previous accumulated interest?

Effective rate of interest
Simple interest
Compound interest
Nominal rate of interest

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Engineering Economics
In a cash-flow diagram:

Time 0 is considered to be the present
A vertical arrow pointing up indicates a positive cash flow
Time 1 is considered to be the end of time period 1
All of these

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Engineering Economics
A telephone switchboard 100 pair cable can be made up with either enameled wire or tinned wire. There will be 400 soldered connections. The cost of soldering a connection on the enameled wire will be P 1.65 on the tinned wire, it will be P 1.15. A 100- pair cable made up with enameled wire cost P 0.55 per linear foot and those made up of tinned wire cost P 0.75 per linear foot. Determine the length of cable run in feet so that the cost of each installation would be the same.

1,100 feet
1,120 feet
1,000 feet
1,040 feet

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