Find the opposite (additive inverse) of the number.- 
A. 15
B. -15
C. 0
D. 
Answer: D
Mathematics
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Solve the problem.Find the moment of inertia about the y-axis of the thin semicircular region of constant density 
bounded by the x-axis and the curve 
.
A. 
?
B. 320?
C. 160?
D. 
?
Mathematics
Divide.
A. 38 B. 3.7 C. 37 D. 3.8
Mathematics
Expand the number to its natural form.6.27 × 1010
A. 627,000,000 B. 6,270,000,000 C. 627,000,000,000 D. 62,700,000,000
Mathematics
Simplify.9 + (-30) ÷ (-6) (-5)
A. -19 B. 19 C. 16 D. -16
Mathematics