Find an equation for the sphere with the given center and radius.Center (0, 0, 8), radius = 5
A. x2 + y2 + 5 z2 - 16z = -39
B. x2 + y2 + 5 z2 + 16z = -39
C. x2 + y2 + z2 + 16z = -39
D. x2 + y2 + z2 - 16z = -39
Answer: D
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Solve the problem.Does the graph of the function y = 6x + 3 sin x have any horizontal tangents in the interval 
If so, where?
A. Yes, at x = 
, x = 
B. Yes, at x = 
C. Yes, at x = 
, x = 
D. No
Write the equation of the line that satisfies the given conditions. Express the final equation in standard form.contains the point (–1, 5) and is perpendicular to the line 6x + 7y = –6
A. 7x - 6y = –37 B. 7x - 6y = 23 C. 7x + 6y = –37 D. x - 6y = 23 E. 7x + 6y = 23
Plot the point in a polar coordinate system.
A. 
B. 
C. 
D. 
Solve the problem.The bar graph below shows the percent of income spent on leisure activities in various countries of the world. In which country is the lowest percent of income spent on leisure activities? What percent is this?
A. China; 93.8% B. Australia; 8.7% C. China; 6.2% D. USA; 70.1%