Evaluate the integral 
.
?
A. 
B. 
C. 
D. 
E. 
Answer: A
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Find the center of mass of the thin rod with the given density function.Find the center of mass of a thin rod that lies along the first-quadrant portion of the circle 
if the density of the rod is 
A. 
= 3, 
= 3
B. 
= 2, 
= 2
C. 
= 
, 
= 
D. 
= 
, 
= 
Use unit ratios to convert the units.12 quarts to gallons
A. 3 gal B. 24 gal C. 6 gal D. 48 gal
Complex numbers are used in electronics to describe the current in an electric circuit. Ohm's law relates the current in a circuit, I, in amperes, the voltage of the circuit, E, in volts, and the resistance of the circuit, R, in ohms, by the formula 
Solve the problem using this formula.Find E, the voltage of a circuit, if I = (2 + 3i) amperes and R = (9 + 5i) ohms.
A. (3 + 37i) volts B. (37 + 3i) volts C. (3 - 37i) volts D. (37 - 3i) volts
Solve the problem.Find the length of the unknown side of the right triangle, where a and b are the legs and c is the hypotenuse. a = 6, b = ?, c = 10
A. b = 10 B. b = 8 C. b = 7 D. b = 9