Solve the problem.The current i (in A) in an amplifier circuit as a function of the time t (in s) is given by 
Find the expression for the voltage across a 5.0-mH inductor in the circuit.[An inductor in an electric circuit is a coil of wire in which the voltage is affected by a changing current. The voltage caused by the changing current is given by VL = L(di/dt) where L is the inductance in H.]
A. 0.18? cos(120?t + ?/5)
B. 36? cos(120?t + ?/5)
C. 0.0015 sin(120?t + ?/5)
D. 0.0015 cos(120?t + ?/5)
Answer: A
Mathematics
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Solve the problem.Find the volume of the right circular cylinder rounded to the nearest thousandth. Use ? ? 3.14
A. 6838.92 mi3 B. 1243.44 mi3 C. 621.72 mi3 D. 13,677.84 mi3
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Simplify the complex fraction.
A. 
B. 
C. k - 2
D. 
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Find the x-intercepts of the graph of each equation.y = (x - 5)(x + 9)
A. (-5, 0), (9, 0) B. (-5, 0), (-9, 0) C. (5, 0), (9, 0) D. (5, 0), (-9, 0)
Mathematics
Write the equation of the graph in its final position.The graph of y = 2x is translated 2 units to the right and then 9 units upward.
A. y = 2x + 2 + 9 B. y = 2x - 9 + 2 C. y = 2x + 9 + 2 D. y = 2x - 2 + 9
Mathematics