Solve.The gravitational attraction A between two masses varies inversely as the square of the distance between them. The force of attraction is 4 lb when the masses are 3 ft apart, what is the attraction when the masses are 6 ft apart?
A. 4 lb
B. 2 lb
C. 3 lb
D. 1 lb
Answer: D
Mathematics
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A. t = 
B. t = 
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A. -33 B. 33
Mathematics