2 years ago

Please hurry this is 7th grade math

Mathematics

1 answer:

Slav-nsk [51]2 years ago

5 0

The correct answer is C 126 miles

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If an investment of $3000 grows to $4432.37 in eight years with interest compounded annually , what is the interest rate?

melamori03 [73]

$\bf \qquad \textit{Compound Interest Earned Amount}
\\\\
A=P\left(1+\frac{r}{n}\right)^{nt}
\quad 
\begin{cases}
A=\textit{accumulated amount}\to &\$4432.37\\
P=\textit{original amount deposited}\to &\$3000\\
r=rate\to r\%\to \frac{r}{100}\\
n=
\begin{array}{llll}
\textit{times it compounds per year}\\
\textit{annually, thus once}
\end{array}\to &1\\
t=years\to &8
\end{cases}$

$\bf 4432.37=3000\left(1+\frac{r}{1}\right)^{1\cdot 8}\implies \cfrac{4432.37}{3000}=(1+r)^8
\\\\\\
\sqrt[8]{\cfrac{4432.37}{3000}}=1+r\implies \sqrt[8]{\cfrac{4432.37}{3000}}-1=r
\\\\\\
0.0500001086\approx r\qquad\qquad\cfrac{r\%}{100}\approx 0.0500001086
\\\\\\
r\%\approx 100\cdot 0.0500001086\implies r=\stackrel{\%}{5}$

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3 years ago

3x - y - 3z if x = -2, y = 1, and z = -2.

dimaraw [331]

3(-2) -(1) -3(-2)
= -6 -1 +6 = -1

7 0

3 years ago

Read 2 more answers

Jeff drove 249 laps around the racetrack is 9 miles long. how many miles did jeff drive

mr_godi [17]

Hey there Jnorman1287.

Answer:

Distance = 249 x 9
= 2,241

Hope this helps :D

<em>~Natasha♥</em>

5 0