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One of the methods that the Internal Revenue Service allows for computing depreciation of certain business property is the sum-of-the-years'-digits method. If a property valued at C dollars has an estimated useful life of N years and a salvage value of S dollars, then the amount of depreciation Dn allowed during the nth year is given by where SN is the sum of the first N positive integers representing the estimated useful life of the property. Thus,
If office furniture worth $7,300 is to be depreciated by this method over N = 11 years and the salvage value of the furniture is $700, find the depreciation for the third year by computing D3 .
Alternator
An electrical generator that converts mechanical energy to electrical energy in the form of alternating current.
Converter
A device that changes the form of an electrical signal or power source, such as converting alternating current (AC) to direct current (DC).
Paul Revere's Engraving
A famous engraving by Paul Revere that depicted the 1770 Boston Massacre, which played a significant role in galvanizing public sentiment against British rule in the American colonies.
Boston Massacre
An event in 1770 in which British soldiers killed five civilian men in Boston, fueling anger that contributed to the American Revolutionary War.
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