Find the sum of the infinite geometric series, if it exists.
A. 
B. 
C. 
D. Does not exist
Answer: A
Mathematics
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Solve the problem. Round your answer, if appropriate.A man 6 ft tall walks at a rate of 4 ft/sec away from a lamppost that is 16 ft high. At what rate is the length of his shadow changing when he is 50 ft away from the lamppost? (Do not round your answer)
A. 
ft/sec
B. 
ft/sec
C. 
ft/sec
D. 
ft/sec
Mathematics
Find the length of the third side of the right triangle.Round to the nearest tenth, if necessary.
A. 151.5 cm B. 4.2 cm C. 12.3 cm D. 2.6 cm
Mathematics
Verify the identity.tan
= 
What will be an ideal response?
Mathematics
Solve the system of equations by Gauss-Jordan elimination.
A. {(5, 4, 3)} B. {(3, 5, 4)} C. {(5, 3, 4)} D. ?
Mathematics