Evaluate the integral.
A. 
sinh 
+ C
B. 4 sinh 
+ C
C. 8 sinh 
+ C
D. 2 sinh 
+ C
Answer: C
Mathematics
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Solve the problem.Find the centroid of the region in the first quadrant bounded by the curve y = 9 cos x and the axes.
A. 
= 
, 
= 
B. 
= 
, 
= 
C. 
= 
, 
= 
D. 
= 
, 
= 
Mathematics
Solve the system by using the inverse of the coefficient matrix. x - y + 4z = -45x + z = 0 x + 2y + z = 8
A. (0, 4, -4) B. (0, 4, 0) C. No solution D. (0, 0, 4)
Mathematics
Use the distributive property to write without parentheses.- (-5t - 4r - 6s)
A. -5t - 4r - 6s B. 5t + 4r - 6s C. 5t + 4r + 6s D. -5t - 4r + 6s
Mathematics
Complete.6 km = 
mi (Round to the nearest tenth.)
A. 6.4 B. 9.7 C. 3.7 D. 5.7
Mathematics