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23 March, 13:18

A certain quantity decays exponentially over time. The initial quantity at t = 0 is 25,000. The quantity decays at a rate of 5%. What is the quantity at t = 3?

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  1. 23 March, 13:31
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    In order to sole the problem you need to create an equation to model what you are trying to do.

    You end up with an equation looking like

    25000*0.95^t

    25000 is the starting value when t=0

    95% is the amount remaining after the 5% decay

    0.95 is being raised to the power of t to determine how many times it has decayed

    When t=3 the equation should be

    25000*0.95^3=21434.375
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