Homework Help: Pre-Calculus

Posted by Erica on Tuesday, October 10, 2006 at 1:07pm.

The formula D= 5e ^-0.4h can be used to find the number of milligrams D of a certain drug that is in a patient's bloodstream h hours after the drug has been administered. When the number of milligrams reaches 2, the drug is to be administered again. WHat is the time between injections?

This looks more like algebra, where D equals 2. Solve for h and you'll have your answer in unit hours.

Solve the formula when D=2
2=5e ^-0.4h
Divide both sides by 5 and take the ln to solve for h.

No one has answered this question yet.

Answer this Question

Related Questions

math - The function D(h)=7e^-0.4(h) can be used to determine the milligrams D of...
Math - The function D(h)=7e^-0.4(h) can be used to determine the milligrams D ...
Calculus - 24. A pharmaceutical company has determined that a realistic model ...
Math(Quick question) - The function D(h)=7e^-0.4(h) can be used to determine ...
Pre Calc! - A drug is eliminated from the body through urine. Suppose that for a...
Pre Calc! - A drug is eliminated from the body through urine. Suppose that for a...
Pre-Calculus - The treatment of a certain viral disease requires a combination ...
math 209 - A certain medicine is given in an amount proportional to a patient&#...
math - A certain medicine is given in an amount proportional to a patient’s...
calculus - The treatment of a certain viral disease requires a combination dose ...

For Further Reading

First Name:
School Subject:
Answer: