Math Problem Statement

The following table shows the expenses and payments on a credit card for 3 months, starting with an initial balance of $450. Use the table as a guide to help you find the balance at the end of the third month, to the nearest dollar. Assume that the APR for the credit card is 27% (billed at a rate of 2.25% per month), and that the interest for a given month is based on the balance for the previous month.

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Solution

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Math Problem Analysis

Mathematical Concepts

Simple Interest
Algebra
Percentage Calculation

Formulas

Interest = Principal × Rate × Time
Balance after interest = Previous Balance × (1 + Monthly Interest Rate)

Theorems

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Suitable Grade Level

Grades 9-12