The concentration of a drug in the body is often expressed in
units of milligrams per kilogram of body weight. The initial dose
of a drug in an animal was 26.3 mg/kg body weight. After 2.49
hours, the concentration had dropped to 15.1 mg/kg body weight. If
the drug is eliminated metabolically by a first-order process, what
is the rate constant for the process in units of min-1? Enter your
answer in scientific notation: k = ______ × 10^ min-1