525 g of salt is placed in a jar of water. After 1 minute, 115 g of salt remains undissolved. How long will it take until only 20 g of salt is undissolved? Assume the salt decays exponentially. Give your answer to the nearest unit.
Added by Todd P.
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Given: Initial amount of salt (a sub 0) = 525 g Amount of salt remaining after 1 minute = 115 g Using the formula a = a sub 0 * e^(kt), we can plug in the values and solve for k: 115 = 525 * e^(k*1) 115/525 = e^k 0.2185 = e^k Taking the natural log of both Show more…
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