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14 March, 08:23

Suppose that a certain fortunate person has a net worth of $77.0 billion ($). If her stock has a good year and gains $3.20 billion () in value, what is her new net worth? Express your answer to three significant figures. Suppose that this individual now decides to give one-eighth of a percent (0.125) of her new net worth to charity. How many dollars are given to charity? The answer is not 10.0025 or 12.5. I have been working at this problem and just need to figure out how do this for future reference.

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  1. 14 March, 08:37
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    New net worth to three significant figures = $80.2 billion

    Dollars are given to charity = $100,250,000

    Explanation:

    Net worth = $77.0 billion

    stock Gains = $3.20 billion

    New net worth = $77.0 billion + $3.20 billion = $80.20 billion

    New net worth to three significant figures = $80.2 billion

    One-eighth of a percent = (1/8 x 1) / 100 = 0.00125

    Dollars are given to charity = 0.00125 X $80.2 billion = $100,250,000

    Or

    $80,200,000,000/100 = $802,000,000
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