Solve the problem.Find the voltage V when the impedance is Z = -4 + 9j and current is I = 8j. (Z = 
)
A. 
- 
j
B. -72 - 32j
C. 72 - 32j
D. 
+ 
j
Answer: B
Mathematics
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Solve the problem.A 50-m-long chain hangs vertically from a cylinder attached to a winch. Assume there is no friction in the system and that the chain has a density of 10 kg/m. How much work is required to wind the chain onto the cylinder if a 60-kg block is attached to the end of the chain?
A. 12,560g J B. 15,500g J C. 25,060g J D. 28,000g J
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Convert to decimal notation.2.0559 × 10-7
A. 0.0000020559 B. -205,590,000 C. 0.00000020559 D. 0.000000020559
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Solve.7y - 4 = -3 + 2y
A. 
B. ?
C. 
D. 
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Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.sin ? = 
, 0 < ? < 
Find cos (2?).
A. 
B. 
C. 
D. - 
Mathematics