Question

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. Gary was given 250 milligrams of medicine which leaves his bloodstream at a rate of 20%. How much of the medicine remains in his system after 4 hours?

Answer 1

102.4

Answer 2

multiply by .8 each hour

Answer 3

after 1 hour 200 2 160 3 128 4 102.4

Answer 4

the options are 27.33mg 82.86mg 12.07mg 112.33mgs?

Answer 5

whats the function?

Answer 6

lert?

Answer 7

idk what you mean?

Answer 8

given by the function A(t) = Iert

Answer 9

its le^rt

Answer 10

-.2

Answer 11

So its 200mg

Answer 12

thats not one of the choices

Answer 13

Sorry I mean 112.33

Answer 14

http://www.wolframalpha.com/input/?i=250e%5E-+.8

Answer 15

250 time e^-.8

Answer 16

I wasnt getting it was an exponential function before

Answer 17

derp

Answer 18

thank you