Determine whether the following is a well-defined set.
{ x | x is an even counting number}
A) yes
B) no
A) yes
Mathematics
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Evaluate the spherical coordinate integral.
A. 
?(15? - 16)
B. 
?(15? - 16)
C. 
?(15? - 8)
D. 
?(15? - 8)
Mathematics
Name the quadrant in which the point is located.(-20, 10)
A. I B. II C. III D. IV
Mathematics
The rule of the derivative of a function f is given. Find the location of all points of inflection of the function f.f'(x) = (x + 4)(x + 1)(x - 5)
A. -4, -1, 5
B. 0
C. -1
D. 
, 
Mathematics
Solve the problem.The price of electric guitars has varied considerably in recent years. The data in the table relates the price in dollars, to time in years. Use a cubic function fitted to the data to predict the price of an electric guitar in year 10. 
A. $827.42 B. $893.53 C. $670.48 D. $443.52
Mathematics