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hoa [83]
3 years ago
8

P² 13p=-30 menentukan nilai p

Mathematics
1 answer:
garri49 [273]3 years ago
4 0
I hope this helps you

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The half-life of a certain substance is 20 years. How much of a 100 gram sample will be left after 20 years?
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\bf \textit{Amount for Exponential Decay using Half-Life} \\\\ A=P\left( \frac{1}{2} \right)^{\frac{t}{h}}\qquad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{initial amount}\dotfill &100\\ t=\textit{elapsed time}\dotfill &20\\ h=\textit{half-life}\dotfill &20 \end{cases} \\\\\\ A=100\left( \frac{1}{2} \right)^{\frac{20}{20}}\implies A=100\left( \frac{1}{2} \right)^1\implies A=50

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500 = 10x + 2 * 15 * 5 + 15x
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side rectangles: 5 * 15 * 2 = 150
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