## rayford Group Title The number of milligrams of a drug that remains in a patient’s system after t hours is given by the function A(t) = Iert. Juan was given 600 milligrams of medicine which leaves his bloodstream at a rate of 30%. How much of the medicine remains in his system after 6 hours? 150.62 mg 133.90 mg 111.58 mg 99.18 mg one year ago one year ago

1. satellite73 Group Title

$$A(t)=le^{rt}$$ ?

2. rayford Group Title

sir??

3. satellite73 Group Title

is that what you wrote?

4. rayford Group Title

yes..

5. rayford Group Title

i'm sorry

6. satellite73 Group Title

in any case i assume it is at a rate of 30% per hour, so you can solve this by computing $600\times (.7)^6$

7. rayford Group Title

ok i'm with you?

8. satellite73 Group Title

sure did you get the answer?

9. rayford Group Title

i got 49.412..?

10. satellite73 Group Title

hmm i don't get any of the above answers when i compute. not sure what is going on

11. satellite73 Group Title

oooh ok i see it. this is really not right, but i will go along with it in any case they want you to compute $600e^{-.3\times 6}=600e^{-1.8}$

12. bieberfan Group Title

rayford... thanks... btw im not a creeper u asked me first

13. satellite73 Group Title

looks like you get $$99.18$$ rounded http://www.wolframalpha.com/input/?i=600e^%28-1.8%29

14. rayford Group Title

huh...that's kinda weird?

15. rayford Group Title

but ok thanks man..