Marian borrowed money to buy a sound system that costs $450. she is charged 5% simple interest for one year. what is the total amount that she pays for the second system if she pays the full amount in one year?

Step-by-step explanation:

The simple interest is calculated with

Where represents the final amount of money, is the principal, is the interest rate in decimal number and is the time.

So, from the problem, we have

Replacing these values, we have

This means Marian has to pay $472.50

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step-by-step explanation: