If 4 = Cp0 x e-0.17 x 12 then Cp0 = 30.8 mg/L.
Since Cp0 = Dose/V we can solve for Dose = Cp0 x V = 30.8 x 29 = 893 mg approximately 900 mg which give a concentration at 12 hours of 4.04 mg/L. Right?
HINT: Notice the 'correct' answer for dose according to the calculation is 893 mg, then using 'professional' judgement we might round this answer to 900 mg. Thus, there are two answers here. The calculated answer and the rounded answer.
Parameter | Value | Units |
Cp0 | 30.8 | mg/L |
Dose | 893 | mg |
Rounded Dose | 900 | mg |
And the answer graphically