Solve the problem.The concentration of a particular drug in a patient's bloodstream is given by 
where C(t) is in milligrams per cubic centimeter and t is the number of hours since the drug was taken. Determine the intervals in which C is increasing and decreasing.
A. C is always decreasing.
B. C is increasing during the first 2.8 hours and decreasing the rest of the time.
C. C is increasing during the first 1.4 hours and decreasing the rest of the time.
D. C is increasing during the first 1.8 hours and decreasing the rest of the time.
Answer: C
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Answer the question.The graph below shows the level curves of a differentiable function f(x, y) (thin curves) as well as the constraint g(x, y) = 
- 
= 0 (thick circle). Using the concepts of the orthogonal gradient theorem and the method of Lagrange multipliers, estimate the coordinates corresponding to the constrained extrema of f(x,y).
A. (1.5, 0.2), (0.7, 1.3), (-1.5, 0.2), (-0.7, 1.3), (-1.5, -0.2), (-0.7, -1.3), (1.5, -0.2), (0.7, -1.3) B. (1.1, 1.1), (-1.1, 1.1), (-1.1,-1.1), (1.1,-1.1) C. (1.5, 0), (0, 1.5), (-1.5, 0), (0, -1.5) D. (1.3, 0.7), (-1.3, 0.7), (-1.3,-0.7), (1.3,-0.7)
Using Green's Theorem, compute the counterclockwise circulation of F around the closed curve C.F = - 
i + 
j; C is the region defined by the polar coordinate inequalities 2 ? r ? 9 and 
A. 85 B. 0 C. 154 D. 63
Given the floor plan, determine whether a person could traverse through each unit by passing through each door only once.
A. No B. Yes
Write the complex number in rectangular form.4(cos 5° + i sin 5°)
A. 0.3 + 4i B. -2 - 0.2i C. 4 + 0.3i D. 2 + 0.2i