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PtichkaEL [24]
3 years ago
5

A window washer uses the proportional relationship y = kx to determine how long (y) it will take him to wash any number of windo

ws (x). It takes the window washer 8 hours to wash 250 windows. What is the value of k?
Mathematics
1 answer:
vladimir2022 [97]3 years ago
3 0

Answer:

C: k=0.032

Step-by-step explanation:

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strojnjashka [21]
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so, from 2006 to 2018 is 12 years then,


\bf \qquad \textit{Amount for Exponential Decay} \\\\ A=P(1 - r)^t\qquad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{initial amount}\dotfill &70000\\ r=rate\to 4\%\to \frac{4}{100}\dotfill &0.04\\ t=\textit{elapsed time}\dotfill &12\\ \end{cases} \\\\\\ A=70000(1-0.04)^{12}\implies A=70000(0.96)^{12} \\\\\\ A\approx 42889.68\implies A=\stackrel{rounded~up}{42890}

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