Find the average rate of change for the function over the given interval.y = 
between x = 2 and x = 8
A. - 
B. 2
C. 
D. 7
Answer: C
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 bounded by the curves y = ± 
and the lines x = 1 and x = 9, with density ?(x) = 
A. 
= 4, 
= 0
B. 
= 5, 
= 0
C. 
= 3, 
= 0
D. 
= 2, 
= 0
Mathematics
Use reference angles to find the exact value of the expression. Do not use a calculator.tan 
A. 
B. 
C. 1
D. -1
Mathematics
Solve the problem.The matrices give points and rebounds for five players in two games. Find the matrix that gives the averages.
A. 
B. 
C. 
D. 
Mathematics
Find the equation of a circle satisfying the given conditions.Center: (-2, 1); radius: 11
A. (x - 1)2 + (y + 2)2 = 11 B. (x + 2)2 + (y - 1)2 = 121 C. (x - 2)2 + (y + 1)2 = 121 D. (x + 1)2 + (y - 2)2 = 11
Mathematics