A patient initially takes 200 mg of a drug that dissolves at a rate of 5% each day. How many days will it take for 130 mg of the drug to be remaining (nearest hundredth)?
The amount of drug left each day is 95 % .95 in decimal form
130 mg = 200 mg (.95)t Where t = days
130/200 = .95t
t = 8.40 days