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Plot[{100 E^(-0.1 t), 100 (0.1 / (0.2-0.1)) (E^(-0.1 t) - E^(-0.2 t))}, {t, 0, 50}]
Plot[{100 E^(-0.1 t), 100 (0.1 / (0.2-0.1)) (E^(-0.1 t) - E^(-0.2 t))}, {t, 0, 50}]
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