In the pair of similar trapezoids, what is the length

Ответ:

lilakatedancer

31.12.2021

$\dfrac{|EH|}{|GH|}=\dfrac{|AD|}{|CD|}\\\\
\dfrac{15}{20}=\dfrac{|AD|}{60}\\
\dfrac{3}{4}=\dfrac{|AD|}{60}\\
4|AD|=180\\
|AD|=45$

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Ответ:

oakleylynn

30.05.2022

Mathematics

The substance's half-life is the time

that satisfies

$\dfrac12=e^{-kt}$

Solve for

:

$\ln\dfrac12=\ln e^{-kt}$
$-\ln2=-kt\ln e$
$\dfrac{\ln2}k=t$

Which means the half-life is $t\approx4.8$ days.

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