function
- f(x)=530*(0.67^x - 0.61^x), when 0 ≤ x ≤ 10 where f(x) is the drug content measured in pg/ml, and x is the number of hours after the intake.

function fx530067x 061x when 0 x 10 where fx is the drug content measured in pgml and x is the number of hours after the intake class=