Solve the triangle.A = 41°, B = 28°, b = 11
A. C = 21°, a ? 7.9, c ? 15.6
B. C = 111°, a ? 15.4, c ? 21.8
C. C = 111°, a ? 7.9, c ? 15.6
D. C = 111°, a ? 7.9, c ? 21.8
Answer: B
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Solve the problem.An electron has a 1.6 x 10-19 C negative charge. How much work is done in separating two electrons from 2.4 pm to 7.3 pm?
A. 13 x 10-16 N ? m B. 6.4 x 10-17 N ? m C. 3.6 x 10-17 N ? m D. 7.2 x 10-39 N ? m
Completely factor the expression.
?
?
A. 
B. 
C. 
D. 
E. 
Subtract.-6.5 - (-3.8)
A. -2.7 B. 2.7 C. -10.3 D. 10.3
Find the center, foci, and vertices of the ellipse.9x2 + y2 - 162x + 720 = 0
A. 
+ (y - 9)2 = 1
center: (9, 0); foci: (9, 2
), (9, -2
); vertices:(9, 3), (9, -3)
B. (x - 9)2 + 
= 1
center: (9, 0); foci: (9, 2
), (9, -2
); vertices:(9, 3), (9, -3)
C. 
+ (y - 3)2 = 1
center: (3, 0); foci: (3, 4
), (3, -2
); vertices:(3, 9),
(3, -9)
D. (x - 3)2 + 
= 1
center: (3, 0); foci: (3, 4
), (3, -4
); vertices:(3, 9), (3, -9)