1. ## Medical Word Problem

this is stumping several people I know , any thoughts ?

12. The amount A (in milligrams) of digoxin, a drug taken by cardiac patients, remaining in the blood t hours after a patient takes a 2 mg dose is given by A = 2(10-.0078t).

(a)How much digoxin remains in the blood of a patient 4 hours after taking a 2 mg dose?

(b)Suppose a patient takes a 2 mg dose at 1:00 p. m. and another 2 mg dose at 5:00 p. m. How much digoxin remains in the patient’s blood at 6:00 p. m.?

2. Originally Posted by AlgebraicallyChallenged
this is stumping several people I know , any thoughts ?

12. The amount A (in milligrams) of digoxin, a drug taken by cardiac patients, remaining in the blood t hours after a patient takes a 2 mg dose is given by A = 2(10-.0078t).

(a)How much digoxin remains in the blood of a patient 4 hours after taking a 2 mg dose?

(b)Suppose a patient takes a 2 mg dose at 1:00 p. m. and another 2 mg dose at 5:00 p. m. How much digoxin remains in the patient’s blood at 6:00 p. m.?
For a, we just need to plug in 4 for t and solve the equation.

For b, calculate how much digoxin is in the blood from the 1:00 p.m. does at 6:00 p.m., and then find the amount of digoxin in the blood from the 5:00 p.m. dose and add the two amounts together.