$\bf \qquad \textit{Amount for Exponential Growth}\\\\
A=I(1 + r)^t\qquad 
\begin{cases}
A=\textit{accumulated amount}\\
I=\textit{initial amount}\\
r=rate\to r\%\to \frac{r}{100}\\
t=\textit{elapsed time}\\
\end{cases}
\\\\\\
f(t)=\stackrel{\stackrel{I}{\downarrow }}{500}(1.015)^t$

5 0

3 years ago

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Joaquin can clean the house in 7 hours by himself. When joaquin and josiah work together it takes 3 hours. About how long would

True [87]

Joaquim Rate per hour = 1/7
Josiah Rate per hour = 1/t

1/7 + 1/x = 1/3
(same denominator & simplification) gives: t = 21/4 = 5.25 .
Josiah needs 5.25 hours to clean alone
(I really don't know why the answer is 5.3 . Can you pls check with the teacher?

8 0

4 years ago

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