Solve the problem.The gravitational attraction between two masses varies inversely as the square of the distance between them. If the force of attraction is 9 lb when the masses are 2 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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Change the decimal to a percent.0.739
A. 739% B. 0.0739% C. 0.739% D. 73.9%
Mathematics
Solve the problem.A paper boy collected $6.55, part in nickels and part in dimes. If the number of nickels was 6 more than one-half the number of dimes, how many nickels were there?
A. 60 nickels B. 41 nickels C. 50 nickels D. 31 nickels
Mathematics
Add: (4 + j5) + (6 + j2)
a. 10 + j7 b. 10 - j3 c. -2 + j3 d. -2 - j3 e. 10 - j7
Mathematics
Factor completely.x4 + x3y - 27x - 27y
A. (x + 3)(x2 - 3x + 9)(x - y) B. (x + 3)(x2 - 3x + 9)(x + y) C. (x - 3)(x2 + 3x + 9)(x + y) D. (x - 27)(x3 + x + y)
Mathematics