A present value of a machine is $1000. Its value depletiation rate is 10% per annum then find the machine value after 2 years?	Choose the correct choice:
A) $900 B) $810 C) $915 D) $715 E) $795
P= $1000   R = 10%   T = 2 years   Machine value after 2 years = P[(1-R/100)^T]   =1000*9/10 * 9/10= 
<gadget id="calculator">1000*9/10 * 9/10</gadget>
<output>810</output>
$810   Answer is $810
<result>B</result>
A present value of a machine is $1000. Its value depletiation rate is 10% per annum then find the machine value after 2 years?