Perform the indicated operation. Simplify if possible.
+ 
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Write the following as an algebraic expression in u, u > 0.cos(arctan u)
A. u
B. 
C. 
D. 
Mathematics
Graph the function.Use the graph of f(x) = ln x to obtain the graph of g(x) = 3 ln x.
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.A drug company establishes that the most effective dose of a new drug relates to body weight as shown below. Let body weight be the independent variable and drug dosage be the dependent variable. Use a graphing utility to draw a scatter diagram and to find the line of best fit. What is the most effective dosage for a person weighing 140 lbs? 
A. 15.22 mg B. 14.5 mg C. 12.07 mg D. 19.48 mg
Mathematics
Find an equation for the ellipse.Vertices at (0, ±4); c = 2
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics