Solve the problem.If s varies directly as t2, and s = 256 when t = 8, find s when t is 3.
A. s = 24
B. s = 32
C. s = 96
D. s = 36
Answer: D
Mathematics
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Solve the problem. Round your answer, if appropriate.A man 6 ft tall walks at a rate of 6 ft/sec away from a lamppost that is 24 ft high. At what rate is the length of his shadow changing when he is 75 ft away from the lamppost? (Do not round your answer)
A. 
ft/sec
B. 75 ft/sec
C. 
ft/sec
D. 2 ft/sec
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Find all solutions of the equation in the interval [0, 2?).(10 cos x - 5)(2 cos x) = 0
A. 
B. 
C. 
D. 
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Multiply and simplify.
? 3b
A. 
b
B. 
C. 
D. 11b
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Divide and simplify.
÷ 
A. 
B. 
C. 
D. 
Mathematics