The file is attached

kindly show me how he got answer

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- Mar 12th 2011, 10:50 AMmoonnightingalecan somebody show me steps for this solution
The file is attached

kindly show me how he got answer - Mar 12th 2011, 10:55 AMskeeter
rather straightforward integration by substitution ...

$\displaystyle u = -\dfrac{x}{100}$

$\displaystyle du = -\dfrac{1}{100} \, dx$

substitute, reset the limits of integration, then use the FTC to evaluate.

btw, your solution is approximate.