Posted by Alexia on Sunday, April 10, 2011 at 7:04pm.
Nuclear medicine technologists use the Iodine isotope I131, with a halflife of 8 days,to check thyroid function of patients. After ingesting a tablet containing the iodine, the isotopes collect in a patient's thyroid, and a special camera is used to view its function. Suppose a person ingests a tablet contaiing 9 microcuries of I131. To the nearest hour, how long will it be until there are only 2.8 microcuries in the person's thyroid?

Math please help!  bobpursley, Sunday, April 10, 2011 at 7:10pm
2.8=9*e^(6.93 t/(8*24))
ln (2.8/9)=6.93 t/182
solve for t in hours. I get about 31 hours

Math please help!  Alexia, Sunday, April 10, 2011 at 7:13pm
the answers are given, it is 324 hours. im just not sure how to get that.

Math please help!  Alexia, Sunday, April 10, 2011 at 7:17pm
where did you get 6.93 and 24 from?

Math please help!  Mgraph, Sunday, April 10, 2011 at 7:47pm
m(t)=9x2^(t/192) 192=24x8
2.8=9x2^(t/192)
t=192xln(9/2.8)/ln2
t=323.4236495
Answer This Question
Related Questions
 mathnatural log  Nuclear medicine technologists use the Iodine isotope I131, ...
 Chemistry  2. The halflife of a radioactive element is important when ...
 chemistry  Iodine131 is used to destroy thyroid tissue in the treatment of an ...
 chem  Iodine131 is often used in nuclear medicine to obtain images of the ...
 Math  Please show me how to solve: Doctors can use radioactive iodine to treat ...
 calculus  PLEASE HELP!  Iodine131 is used to treat hypothyroidism since it ...
 CALC  integrals!  Iodine131 is used to treat hypothyroidism since it is ...
 Exponential Growth and Decay  Doctors use iodine131 to treat some forms of ...
 math  to determine whether a person has as thyroid deficiency, a radioactive ...
 Science  Iodine131 is used I'd diagnosing certain medical problems because of ...
More Related Questions