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  1. johnmiltons

    Exponential Growth and Decay

    I've kinda been having some trouble with this question- can anyone help me out? The current C flowing in a conductor dissipates according to the formula dC/dt = -kC. If it dissipates by 40% in 5 seconds, how long will it take to dissipate to 20% of the original current? (The answer is 15.8...
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