Find the value of the derivative (if it exists) at the indicated extremum.
?
?
A. 
is undefined.
B. 
C. 
D. 
E. 
Answer: A
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Use the product rule, quotient rule, or power rule to expand the logarithmic expression. Wherever possible, evaluate logarithmic expressions.log4
A. 
B. 4
C. - log4x
D. 1 - log4x
Write the ratio of corresponding sides for the similar triangles and reduce the ratio to lowest terms.
A. 
= 
= 
B. 
= 
= 
C. 
= 
= 
Use the distributive property to rewrite the sum or difference as a product. Simplify the answer if possible.hx - kx
A. h(x - k) B. (h - x)k C. x(h - k) D. x(h + k)
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