Solve the problem.The concentration of a drug in the bloodstream, measured in milligrams per liter, can be modeled by the function, 
where t is the number of minutes after injection of the drug. When will the drug be at its highest concentration? Approximate your answer rounded to two decimal places.
A. at the time of injection
B. t = 4 minutes after the injection is given
C. t = 3.65 minutes after the injection is given
D. t = 0.55 minutes after the injection is given
Answer: D
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Parametrize the surface S.S is the portion of the plane 4x + 7y + 8z = -1 that lies within the cylinder 
.
What will be an ideal response?
Write the sentence as a proportion.1 tbsp of hot cocoa mix is to 2.5 cups of hot cocoa as 7 tbsp of hot cocoa mix is to 17.5 cups of hot cocoa.
A. 
B. 
= 
C. 
= 
D. 
Use the given feasible region determined by the constraint inequalities to find the minimum possible value of the objective function.f = 3x + 11y subject to the constraints 
A. 0 B. 198 C. 108 D. 323
Determine whether (f ? g)(x) = x and whether (g ? f)(x) = x.f(x) = x2 + 2 , g(x) = 
- 2
A. Yes, no B. Yes, yes C. No, no D. No, yes