Find the center of mass of a thin plate covering the given region with the given density function.The region bounded below by the parabola 
and above by the line 
, with density 
A. 
= 
, 
= 
B. 
= 
, 
= 
C. 
= 
, 
= 
D. 
= 
, 
= 
Answer: D
Mathematics
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Factor the polynomial completely. If the polynomial is prime, so state.6a2 + 11ab + 4b2
A. (2a - b)(3a - 4b) B. (2a + b)(3a + 4b) C. (6a + b)(a + 4b) D. prime
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Find different polar coordinates (r, ?) for the same point under the given conditions.
, r > 0 and -2? < ? < 0
A. 
B. 
C. 
D. 
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Solve the problem.A ball is thrown downward from a window in a tall building. The distance traveled by the ball in t seconds is 
where s is in feet. How long (to the nearest tenth) will it take the ball to fall 230 feet?
A. 2.9 sec B. 8.4 sec C. 3.8 sec D. 2.7 sec
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Write the improper fraction as a mixed number.
A. 3
B. 4
C. 4
D. 5
Mathematics