Soon After Taking an Aspirin, a Patient Has Absorbed 350

Multiple Choice

Soon after taking an aspirin, a patient has absorbed 350 mg of the drug. If the amount of aspirin in the bloodstream decays exponentially, with half being removed every 2 hours, find the time it will take for the amount of aspirin in the bloodstream to decrease to 260 mg. ​
Select the answer rounded to three decimal places.
​

A) 1.715 hours
B) 0.858 hours
C) 0.429 hours
D) 2.573 hours
E) 2.144 hours