finance-math 0.0.1

finance-rust is a simple common finance mathematics in rust.
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<h1 class='fqn'><span class='in-band'>Function <a href='index.html'>finance</a>::<wbr><a class='fn' href=''>r72</a></span><span class='out-of-band'><span id='render-detail'>
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<pre class='rust fn'>pub fn r72(rate: <a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.f64.html'>f64</a>) -&gt; <a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.f64.html'>f64</a></pre><div class='docblock'><p>In finance, the rule of 72, the rule of 70 and the rule of 69.3 are methods for estimating an investment&#39;s doubling time. The rule number (e.g., 72) is divided by the interest percentage per period to obtain the approximate number of periods (usually years) required for doubling
see definition: <a href="https://en.wikipedia.org/wiki/Rule_of_72">https://en.wikipedia.org/wiki/Rule_of_72</a></p>
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