Solve the given applied problems involving variation.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. 3 lb
C. 1 lb
D. 2 lb
Answer: C
Mathematics
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A. Yes B. No
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Solve the system by the addition method.2x2 + y2 = 173x2 - 2y2 = -6
A. {(1, 3), (-1, -3)} B. {(2, 3), (2, -3), (-2, 3), (-2, -3)} C. {(2, -3), (-2, 3)} D. {(1, 3), (1, -3), (-1, 3), (-1, -3)}
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Given matrix A, find the indicated cofactor.Find A34.A = 
A. 144 B. 288 C. 0 D. -144
Mathematics
Solve the problem. Round your answer to the nearest tenth.If $2500 is invested in an account that pays interest compounded continuously, how long will it take to grow to $5200 at 5%?
A. 15.8 years B. 14.6 years C. 13.9 years D. 5.5 years
Mathematics