Find y '.y = 
A. - 
+ 2x
B. 
+ 2x
C. - 
- 2x
D. - 
- 2x
Answer: D
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Solve the problem.When an alternating current passes through a series RLC circuit, the voltage and current are out of phase by angle ?. Here ? = tan-1[(XL - XC)/R], where XL and XC are the reactances of the inductor and capacitor, respectively, and R is the resistance. Find d?/dXL for constant XC and R.
A. 
B. 
C. 
D. 
Find the exponential function that satisfies the given conditions.Initial mass = 7 g, decreasing at a rate of 3.7% per day
A. m(t) = 7 ? 0.963t B. m(t) = 3.7 ? 0.93t C. m(t) = 7 ? 1.037t D. m(t) = 7 ? 1.37t
? is a central angle that cuts off an arc of length s. Find the radius of the circle if 
, s = ? cm.
?
A. 9 cm B. 14 cm C. 12 cm D. 12.1 cm E. 13 cm
Rewrite the series using summation notation. Use 1 as the lower limit of summation.2(12) + 2(22) + . . . + 2(62)
A. 
B. 
C. 
D. 