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3 years ago

I WILL MARK BRAINLIEST !!! Harper is going to invest $6,900 and leave it in an account for 12 years. Assuming the

Mathematics

2 answers:

Komok [63]3 years ago

7 0

Answer:

4.4%

Step-by-step explanation:

A=P\left(1+\frac{r}{n}\right)^{nt}

A=P(1+

)

Compound interest formula

A=11700\hspace{35px}P=6900\hspace{35px}t=12\hspace{35px}n=365

A=11700P=6900t=12n=365

Given values

11700=

\,\,6900\left(1+\frac{r}{365}\right)^{365(12)}

6900(1+

365

)

365(12)

Plug in values

11700=

\,\,6900\left(1+\frac{r}{365}\right)^{4380}

6900(1+

365

)

4380

Multiply

\frac{11700}{6900}=

6900

11700

\,\,\frac{6900\left(1+\frac{r}{365}\right)^{4380}}{6900}

6900

6900(1+

365

)

4380

Divide by 6900

1.695652174=

\,\,\left(1+\frac{r}{365}\right)^{4380}

(1+

365

)

4380

\left(1.695652174\right)^{1/4380}=

(1.695652174)

1/4380

\,\,\left[\left(1+\frac{r}{365}\right)^{4380}\right]^{1/4380}

[(1+

365

)

4380

]

1/4380

Raise both sides to 1/4380 power

1.000120571=

\,\,1+\frac{r}{365}

365

-1\phantom{=}

−1=

\,\,-1

−1

Subtract 1

0.000120571=

\,\,\frac{r}{365}

365

365\left(0.0001206\right)=

365(0.0001206)=

\,\,\left(\frac{r}{365}\right)365

(

365

)365

Multiply by 365

0.044008415=

\,\,r

4.4008415\%=

4.4008415%=

\,\,r

zhannawk [14.2K]3 years ago

3 0

Answer:

4.4%

Step-by-step explanation:

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icang [17]

Answer:

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(You only need to give one solution)

Step-by-step explanation:

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asambeis [7]

Answer for Problem 2:

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Step-by-step explanation:

I'm not completely sure of problem 1, but I know what problem 2 is.

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4 years ago

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