Solve the problem.The test scores of 40 students are summarized in the frequency distribution below. Find the grouped mean rounded to the nearest tenth. 
A. 74.5
B. 68.9
C. 72.5
D. 65.3
Answer: C
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Write the following exponential expression in simplest form.
?
?
A. 
B. 
C. 
D. 
E. 
Find the potential function f for the field F.F = 2xex2+y2i + 2yex2+y2j
A. f(x, y, z) = ex2 + ey2 + C
B. f(x, y, z) = 
+ C
C. f(x, y, z) = ex2+y2 + C
D. f(x, y, z) = 2ex2+y2 + C
Reduce the fraction to simplest form.
A. x2 + a2 B. x2 - ax + a2 C. Cannot be simplified D. x2 + ax + a2
The graph of a function f is given. Use the graph to answer the question.Find the numbers, if any, at which f has a local maximum. What are the local maxima?
A. f has no local maximum B. f has a local maximum at x = 0; the local maximum is -2 C. f has a local maximum at -?; the local maximum is 2 D. f has a local maximum at x = -? and ?; the local maximum is 2