m(t) = 15e−0.087t,
is measured in grams. After how many days is there only 3 g remaining? (Round your answer to the nearest whole number.) days
m(t) = 15e−0.087t =3
e-0.087t = 3/15
ln(0.2)/(-0.087) = -1.60944/ (-0.087) =18.499=18.5 days=18 days or 19 days
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