Evaluate.- 
- (- 
)
A. - 
B. 
C. - 
D. - 1
Answer: A
Mathematics
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Find the probability.A die is rolled 20 times and the number of twos that come up is tallied. Find the probability of getting exactly two twos. Round to the nearest thousandth when necessary.
A. 0.011 B. 0.159 C. 0.116 D. 0.198
Mathematics
For what values of x does the series converge absolutely?
A. x = 8 B. x = -8 C. x = ±8 D. -9 < x < -7
Mathematics
Solve the problem.Find the center of mass of the region of constant density bounded by the paraboloid 
and the xy-plane.
A. 
= 0, 
= 0, 
= 
B. 
= 0, 
= 0, 
= 
C. 
= 0, 
= 0, 
= 
D. 
= 0, 
= 0, 
= 
Mathematics
Find any values of the variables that must be excluded.
A. a = 8 B. a = 8, a = 4 C. a = -8 D. Defined for all real numbers
Mathematics