Question

@Nnesha will you help me . The simple interest on an investment of $4000 for one year is $140.

What is the interest rate?

A.
0.035%

B.
3.5%

C.
35%

D.
350%

Answer 1

divide number of year /investment
and then multiply by 100

Answer 2

\(\large {
\qquad \textit{Simple Interest Earned}\\
I = Prt\qquad
\begin{cases}
I=\textit{interest earned}\to &\$140\\
P=\textit{original amount deposited}\to& \$4000\\
r=rate\to r\%\to \frac{r}{100}\\
t=years\to &1
\end{cases}
}\)

solve for "r"

Answer 3

so 4000/140*100 ?

Answer 4

is that correct?

Answer 5

yea

Answer 6

so a or d because when i did that I got a crazy number

Answer 7

what's that ?

Answer 8

what's what?

Answer 9

crazy number ?

Answer 10

this is the number i got when i did it look. 4000/140*100=2857.142857142857

Answer 11

\(\color{blue}{\text{Originally Posted by}}\) @jdoe0001
\(\large {
\qquad \textit{Simple Interest Earned}\\
I = Prt\qquad
\begin{cases}
I=\textit{interest earned}\to &\$140\\
P=\textit{original amount deposited}\to& \$4000\\
r=rate\to r\%\to \frac{r}{100}\\
t=years\to &1
\end{cases}
}\)

solve for "r"
\(\color{blue}{\text{End of Quote}}\)
use this formula
A = 140 so replace i by 140
p by 4000

Answer 12

one year so t=1 substitute values into the formula

Answer 13

substitute