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castortr0y [4]
3 years ago
10

Whats the answer for 0.4r When r=6 the problem is evaluate expressions? Please asap

Mathematics
2 answers:
SpyIntel [72]3 years ago
5 0
The answer is 0.4r=2.4.

777dan777 [17]3 years ago
3 0
You put in 6 for 4 and do 6 x 0.4 and that would be 2.4
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3 years ago
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choli [55]

\bf ~~~~~~ \textit{Simple Interest Earned Amount} \\\\ A=P(1+rt)\qquad \begin{cases} A=\textit{accumulated amount}\dotfill&7020\\ P=\textit{original amount deposited}\dotfill & \$4500\\ r=rate\to 3\%\to \frac{3}{100}\dotfill &0.03\\ t=years\dotfill \end{cases}


\bf 7020\geqslant 4500(1+0.03t)\implies \cfrac{7020}{4500}\geqslant 1+0.03t\implies \cfrac{39}{25}\geqslant 1+0.03t \\\\\\ \cfrac{39}{25}-1\geqslant 0.03t\implies \cfrac{14}{25}\geqslant 0.03t\implies \cfrac{~~\frac{14}{25}~~}{0.03}\geqslant t\implies \cfrac{56}{3}\geqslant t \\\\\\ 18\frac{2}{3}\geqslant t\impliedby \textit{18 years and 8 months}~\hfill \boxed{0 \leqslant t \leqslant 18\frac{2}{3}} \\\\\\ ~\hspace{34em}


check the picture below.


bearing in mind that "t" cannot be less than 0.

8 0
3 years ago
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