$\bf \qquad \textit{Simple Interest Earned}\\\\
I = Prt\qquad 
\begin{cases}
I=\textit{interest earned}\to &\$450\\
P=\textit{original amount deposited}\to& \$3000\\
r=rate\to r\%\to \frac{r}{100}\\
t=years\to &3
\end{cases}
\\\\\\
450=3000\cdot r\cdot 3\implies \cfrac{450}{3\cdot 3000}=r\implies \cfrac{1}{20}=r
\\\\\\
r\%\implies \cfrac{1}{20}\cdot 100\implies r=\stackrel{\%}{5}$

5 0

3 years ago

Read 2 more answers

Use numerals instead of words. If necessary, use decimals instead of fractions.

Keith_Richards [23]

26 % ------------------------ $45.50
100 % ----------------------- $x
--------------------------------------------
26 : 100 = 45.50 : x
26 x = 4,550
x = 4,550 : 26
x = $175
Answer:
It made $175 in total sales.

4 0

2 years ago

ou select a marble without looking and then put it back. If you do this 21 times, what is the best prediction possible for the n

wolverine [178]

5/7 = non orange marbles
?/21 = chances to pick a non blue
21/7 = 3
5x 3 =15
15/21

4 0

3 years ago