Find the angle 
between the vectors. Round your answer to two decimal places.
?
?
A. 
B. 
C. 
D. 
E. 
Answer: E
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Solve the problem.Find the centroid of a hemispherical shell having outer radius 9 and inner radius 2 if the density varies as the square of the distance from the base.
A. 
= 0, 
= 0, 
= 
B. 
= 0, 
= 0, 
= 
C. 
= 0, 
= 0, 
= 
D. 
= 0, 
= 0, 
= 
Provide an appropriate response.List the factor pairs of 36 and write all the factors in order from smallest to largest.
A. 1 × 36; 1, 2, 3, 4, 6, 9, 12, 18, 36 B. 1 × 36, 6 × 6; 1, 6, 36 C. 1 × 36, 2 × 18, 3 × 12, 4 × 9, 6 × 6; 1, 2, 3, 4, 6, 9, 12, 18, 36 D. 1 × 36, 3 × 12, 6 × 6
Compute AB, if possible.A = 
and B = 
A. not possible
B. 
C. 
D. 
Find the center and the radius of the circle.x2 + y2 + 6x - 4y + 13 = 16
A. (2, -3); r = 4 B. (-2, 3); r = 16 C. (-3, 2); r = 4 D. (3, -2); r = 16