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  • Perplex
    IB Math AISL
    /
    Sequences & Series
    /

    Problem Bank

    [Maximum mark: 8]

    Carmen earns ​$55,000​ per year (after taxes) - at her current job. She is considering going to graduate school, but she will need to take out a loan to cover the ​$78,000​ cost.


    The Bank of Perplex offers Carmen a loan with a ​7%​ annual rate, compounded quarterly.

    1. Calculate to the nearest dollar the balance Carmen will owe when she finishes graduate school.

      [2]

      To earn a crown, get your answer ready before you reveal the options!

    After graduating, Carmen begins making monthy payments of ​$P, such that her debt will be paid off after ​10​ years.

    1. Find the value of ​$P, to the nearest dollar.

      [3]

    Carmen expects her salary to increase by ​k%​ after graduate school. With this increased salary, she hopes to break even on her "investment" in graduate school within 10 years.

    1. Find the minimum possible value of ​k.

      [3]

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