Solve the problem.Find the center of mass of the thin semicircular region of constant density 
bounded by the 
and the curve 
.
A. 
= 0, 
= 
B. 
= 0, 
= 
C. 
= 0, 
= 
D. 
= 0, 
= 
Answer: D
Mathematics
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A. n2 + 121 B. n2 + 22n + 121 C. n + 121 D. 121n2 + 22n + 121
Mathematics
List the first eight multiples of the given number.16
A. 16, 18, 21, 25, 30, 36, 43, 51 B. 16, 17, 18, 19, 20, 21, 22, 23 C. 16, 32, 48, 64, 80, 96, 112, 128 D. 0, 16, 32, 48, 64, 80, 96, 112
Mathematics
Determine the domain and the range of the function.f(x) = -x2 + 8x - 7
A. domain: all real numbers range: {y|y ? -9} B. domain: all real numbers range: {y|y ? 9} C. domain: all real numbers range: all real numbers D. domain: {x|x ? -4} range: {y|y ? 9}
Mathematics
Find the requested value.f(-6) for f(x) = 
A. -36 B. 54 C. -47 D. 49
Mathematics