Multiply. Write a mixed numeral for the answer.5
? 8
A. 13
B. 40
C. 80
D. 44
Answer: D
Mathematics
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Find the natural domain of the function.f(x, y) = 
A. All points in the x-y plane except (0, 0)
B. All points in the x-y plane except 
C. All points in the x-y plane except x = 0
D. All points in the x-y plane
Mathematics
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 = 72 - x2 and y = x2, with density ?(x) = x2
A. 
= 36, 
= 0
B. 
= 0, 
= 
C. 
= 0, 
= 36
D. 
= 0, 
= 72
Mathematics
Find the average value of the function f over the region R.f(x, y) = 6x + 10yR: 0 ? x ? 3, 0 ? y ? 8
A. 9 B. 14 C. 13 D. 49
Mathematics
Use the even-odd identities to find the exact value of the expression. cos (-?)
A. undefined B. 0 C. 1 D. -1
Mathematics