Ohm's Law for the current I in a circuit with voltage E, resistance R, capacitance reactance XC, and inductive reactance XLis  Use this law to solve the problem.Find E if  R = 3, XL= 8, and XC= 4.

A. -57i
B. -25i
C. 25i
D. 57i

Answer: C

Mathematics

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Find the value.If F(x, y) = ln (x2 + y2), find Fx(1, 3) and Fy(1, 3).

A. Fx(1, 3) = , Fy(1, 3) = 
B. Fx(1, 3) = , Fy(1, 3) = 
C. Fx(1, 3) = , Fy(1, 3) = 
D. Fx(1, 3) = , Fy(1, 3) = 

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Mathematics

Solve for x. Round to the nearest ten-thousandth.log (538x) = 3.631

A. 0.1258 B. 0.9002 C. 21.3627 D. 7.9473

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Mathematics

For the given amounts A and B, find the requested percent of change. Round to the nearest whole percent if necessary.A = 270, B = 30Find the percent change if B changes to A.

A. 900% B. -800% C. 800% D. -900%

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Mathematics

Solve the problem.The velocity v of a meteorite approaching the earth is given by  kilometers per second, where d is the meteorite's distance from the center of the earth and k is a constant. What is the velocity of a meteorite that is 8000 kilometers away from the center of the earth, if   Give your answer as a simplified radical.

A.   kilometers per second
B.  kilometers per second
C.  kilometers per second
D. 14,000 kilometers per second

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Mathematics