Solve the problem.The gravitational attraction A between two masses varies inversely as the square of the distance between them. The force of attraction is 2.25 lb when the masses are 4 ft apart, what is the attraction when the masses are 6 ft apart?
A. 3 lb
B. 1 lb
C. 4 lb
D. 2 lb
Answer: B
Mathematics
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Identify the radicand.4ab
A. 
B. b2 - 3
C. b2
D. 4ab
Mathematics
Find the standard deviation for the given data. Round your answer to one more decimal place than the original data.19, 16, 12, 13, 18, 16, 18, 7, 11
A. 3.7 B. 1.8 C. 4.2 D. 4.0
Mathematics
Solve the problem."If choice X is a winner of an election and, in a reelection, the only changes in the ballots are changes that only favor X, then X should remain a winner of the election." This fairness criterion is called the
A. Condorcet criterion. B. independence of irrelevant alternatives criterion. C. monotonicity criterion. D. majority criterion. E. none of these
Mathematics
Evaluate or simplify the exponential expression.(-3)0
A. -3 B. 0 C. -1 D. 1
Mathematics