Use a calculator to evaluate the expression. Round the answer to three decimal places.(3.15)-3
A. 31.256
B. 0.032
C. -0.032
D. -31.256
Answer: B
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 enclosed by the parabolas y = 8 - x2 and y = x2, with density ?(x) = x2
A. 
= 4, 
= 0
B. 
= 0, 
= 
C. 
= 0, 
= 4
D. 
= 0, 
= 8
Mathematics
Write the complex number in rectangular form.5
A. - 
+ 
i
B. 
- 
i
C. - 
+ 
i
D. 
- 
i
Mathematics
Simplify the expression. Assume that all variables represent positive real numbers.
-2/3
A. 9
B. 2187
C. 
D. 81
Mathematics
Given the side lengths of a right triangle, find the indicated value. adj = 5, hyp = 
Find sin ?.
A. sin ? = 
B. sin ? = 
C. sin ? = 
D. sin ? = 
Mathematics