SOLUTION: Sodium-24 is a radioactive isotope of sodium that is used to study circulatory dysfunction. Assuming that 4 micrograms of sodium-24 are injected into a person, the amount A in micr
Algebra.Com
Question 1006212: Sodium-24 is a radioactive isotope of sodium that is used to study circulatory dysfunction. Assuming that 4 micrograms of sodium-24 are injected into a person, the amount A in micrograms remaining in that person after t hours is given by the equation A = 4e^−0.046t.
(b) What amount of sodium-24 remains after 8 hours? (Round your answer to two decimal places.)
=µg
(c) What is the half-life of sodium-24? (Round your answer to two decimal places.)
=h
(d) In how many hours will the amount of sodium-24 be 1 microgram? (Round your answer to two decimal places.)
=h
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
The decay model written better, .
(b)
After 8 hours, just plug-in t=8 and compute A.
(c)
Very simply choose to find half-life.
Compute to
, in HOURS
(d)
This is similar to finding half-life.
You want A=1, and again find logarithms of both sides of the decay equation, to
solve for t.
and you can finish the computing.
RELATED QUESTIONS
A radioactive element sodium-24 has a half-life of 14 hours and is used to help locate... (answered by stanbon)
Scientist made 160mg of radioactive sodium and found that there was only 20mg left 45... (answered by ikleyn)
snack mix A is 12% sodium and snack mix B is 4% sodium. we want to make a 40oz snack mix... (answered by josgarithmetic,greenestamps)
This is not from a book, but I desperately need it answered in the next couple hours.... (answered by stanbon,scott8148)
A research person made 160 mg of radioactive sodium and found that there was only 20 mg... (answered by ikleyn)
coca-cola is 5% sodium and pepsi is 15% sodium how many liters of each should be mixed to (answered by josgarithmetic)
A chemist is mixing a solution that is 32% sodium and another solution that is 12%... (answered by stanbon)
Use the exponential decay equation given below, where A is the amount of a radioactive... (answered by josgarithmetic)
Sodium-24 is used for medical purposes. The half-life of sodium-24 is 14.9 h. A hospital... (answered by josgarithmetic)