1.

The effect E of a drug on a human patient is a function of both the amount a: (in milligrams) of the drug administered and the amount of time t (in hours) that has passed since the drug was administered. For a particular drug, the function that relates these quantities is E($s t) = 18.5$1'40_0'07t Round all answers to 2 decimal places. a. Find the effect that 100 mg of the drug has on a patient 2 hours after it has been administered. E(100, 2) = b. Find the change in the effect of the drug on the patient if the dosage had been 90 mg rather than 100. Hint: Find the difference between E(90, 2) and your answer in part a. c. Find the change in the effect of the drug 3 hours after 100 mg has been administered. Hint: Find the difference between E(100, 3) and your answer in part a. For the television, radio, and newspaper sales function N(:r:, y, 2:) = 27009: + 12003; + 9002 2:1:2 y2 22 find the number of sales, N, if a: = 70, y = 19, and z = 15, where 3:, y, and z are in thousands of dollars. N(70, 19,15) = Find the exact or approximate (to two decimal places) value of the function. Find f(2, 4, 11) if f(:1:,y,z) = emeyln(z) we