Respuesta :

The simple interest formula for a future quantity is the following:

[tex]A=P(1+rt)[/tex]

Where:

[tex]\begin{gathered} P=\text{present value} \\ r=\text{interest rate} \\ t=\text{time} \end{gathered}[/tex]

Solving for the present value we get:

[tex]P=\frac{A}{1+rt}[/tex]

Replacing the given values:

[tex]P=\frac{86499}{1+(0.1)(5)}[/tex]

Solving the operations:

[tex]P=57666[/tex]

Therefore, she needs $57666

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