Provide an appropriate response.True or false? If the average cost is decreasing then the marginal cost must be less than the average cost.
A. False
B. True
Answer: B
Mathematics
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Solve the problem.The equation 
arises in the design of rods and pistons. Solve for ?.
A. ? = 
cos-1 
B. ? = cos-1 
C. ? = cos-1 
D. ? = 
cos-1 
Mathematics
Find the probability.In a certain college, 33% of the physics majors are ethnic minorities. A random sample of 10 physics majors is chosen. Find the probability that exactly 4 are not ethnic minorities. Round to the nearest ten-thousandth.
A. 0.0467 B. 0.2253 C. 0.2564 D. 0.0547
Mathematics
Identify the radicand and index.9ab 
A. b2; 2
B. 9ab; 2
C. b2 - 5; 3
D. 
; 3
Mathematics
Find the center and the radius of the circle.x2 + y2 + 18x - 12y + 117 = 4
A. (-9, 6), r = 2 B. (-6, 9), r = 4 C. (9, -6), r = 4 D. (6, -9), r = 2
Mathematics