Question 1131523
Find the monthly rate of loss
{{{ 14000 = 15000*( 1 - r )^3 }}}
{{{ 14/15 = ( 1 - r )^3 }}}
{{{ log( 14/15 ) =3*log( 1 - r ) }}}
{{{ log( .9333 ) = 3*log( 1 - r ) }}}
{{{ -.029963/3 = log( 1 - r ) }}}
{{{ -.0099877 = log( 1 - r ) }}}
{{{ 1 - r = .977265 }}}
{{{ r = .0227 }}} monthly rate of loss
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1 yr ago, or 12 months ago compared to today:
{{{ 15000 = C*( 1 - .0227 )^12
{{{ 15000 = C*.9773^12 }}}
{{{ 15000 = C*.75916 }}}
{{{ C = 19758.61 }}}
A year ago the value was $19,758.61
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