Solve the inequality. Other than ?, graph the solution set on a number line.21x - 18 > 3(6x - 4)
A. (-?, 2]
B. [2, ?)
C. (-?, 2)
D. (2, ?)
Answer: D
Mathematics
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Find the center of mass of a thin plate covering the given region with the given density function.The region between the curve y = 
and the x-axis from x = 1 to x = 9, with density ?(x) = 
A. 
= 
, 
= 
B. 
= 
, 
= 1
C. 
= 5, 
= 2
D. 
= 
, 
= 24
Mathematics
Solve the equation for exact solutions.4 cos-1 x = ?
A. 
B. 
C. 
D. 
Mathematics
Find the integral.
A. 3x2 ln x - 
+ C
B. 
ln x - 
+ C
C. 3x2 ln x - 
x2 + C
D. 3x ln x - 
x + C
Mathematics
Construct a truth table for the given statement and then determine if the statement is a tautology.( ~ p ? q) ? (p ? q)
A. 
Is not a tautology.
B. 
Is not a tautology.
C. 
Is a tautology.
D. 
Is not a tautology.
Mathematics