math

posted by .

2 hours after a given drug has been administered there is only 75% of it left in the body. a. What percentage of it leaves the body every hour (find the hourly decay rate)?
b. What is the continuous decay rate?
c. How long until 50% has left the body?
d. How long until 99% of it has left the body?

Similar Questions

1. Calculus

A patient is given a drug intravenously at a rate of 43.2 mg/hour. The drug enters a compartment volume or the volume of the part of the body of 35,000 ml. The rate at which the drug leaves the body (mg/hour) is proportional to the …
2. Pre Calc!

A drug is eliminated from the body through urine. Suppose that for a dose of 10 milligrams, the amount A(t) remaining in the body t hours later is given by A(t)=10(0.8)^t and that in order for the drug to be effective, at least 2 milligrams …
3. Pre Calc!

A drug is eliminated from the body through urine. Suppose that for a dose of 10 milligrams, the amount A(t) remaining in the body t hours later is given by A(t)=10(0.8)^t and that in order for the drug to be effective, at least 2 milligrams …
4. PRE-CALC

A drug is eliminated from the body through urine. Suppose that for an initial dose of 10 milligrams, the amount A (t) in the body t hours later is given by A(t) = 10(0.8) t a) Estimate the amount of the drug in the body 8 hours after …
5. calculas

Hydrocodone bitartrate is used as a cough suppressant. After the drug is fully absorbed, the quantity of drug in the body decreases at a rate proportional to the amount left in the body, with constant of proportionality . Suppose that …
6. math

suppose 250mg of a drug is injected into a persons bloodstream. as the drug is metabolized, the quantity diminishes at the continuous rate of 4% per hour. by what percent does the drug level decrease during any given hour?
7. Precalculus

Suppose 3 mg of a drug is injected into a person's bloodstream. As the drug is metabolized, the quantity diminishes at the continuous rate of 6 % per hour. Find a formula for Q(t), the quantity of the drug remaining in the body after …
8. calculus

Hydrocodone bitartrate is used as a cough suppressant. After the drug is fully absorbed, the quantity of drug in the body decreases at a rate proportional to the amount left in the body, with constant of proportionality . Suppose that …
9. Pre-Calculus

At time t hours after taking the cough suppressant hydrocodone bitartrate, the amount A, in mg, remaining in the body is given by A=13(0.82)^t. a) What was the initial amount taken?
10. Math

the amount (in milligrams) of a drug in the body t hours after taking a pill is given by A(t)=30(0.8)t . (a) What is the initial dose given?

More Similar Questions