Sarah has $250 in her account. She withdraws $25 per week. How many weeks can she withdraw money fro

Discussion in 'Calculator Requests' started by math_celebrity, Mar 7, 2021.

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  1. math_celebrity

    math_celebrity Administrator Staff Member

    Sarah has $250 in her account. She withdraws $25 per week. How many weeks can she withdraw money from her account and still have money left?

    Let w be the number of weeks. We have the following equation for the Balance after w weeks:
    B(w) = 250 - 25w we subtract for withdrawals

    The ability to withdrawal money means have a positive or zero balance after withdrawal. So we set up the inequality below:
    250 - 25w >= 0

    To solve this inequality for w, we type it in our search engine and we get:
    w <= 10

    So Sarah can withdrawal for up to 10 weeks
     

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