Find the center and radius of the circle with the given equation. x2 + y2 = 9
A. (0, 0); r = 3
B. (3, 3); r = 3
C. (0, 0); r = 9
D. (3, 3); r = 9
Answer: A
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A. -8 B. -7 C. 7 D. -6
Solve.A pulsed electric voltage that is offset by a dc component of 2V is defined by 
where t is time (in ?s). Find a0 (if it is not zero), two nonzero cosine terms (if they exist), and two nonzero sine terms (if they exist) of the Fourier series for the time-dependent voltage.
A. 
- 
B. 
- 
C. 
- 
D. 2 - 
Graph the solution set of the system of inequalities.
A. 
B. 
C. 
D. 
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A. Children can manage sport cars. B. Everybody can manage sport cars. C. Children can't manage sport cars. D. Nobody can manage sport cars. E. none of these