Find the power rounded to three significant digits.
A. 0.0139
B. 0.000258
C. 0.00000258
D. 0.000140
E. 0.00139
Answer: D
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Solve the problem.Six Republicans and six Democrats orally cast their vote in the U.S. Senate. In how many orders can they vote if the first person to vote must be a Democrat?
A. 6 × 11!
B. 6! × 6!
C. 
D. 12!
E. none of these
Use the fundamental identities to simplify the expression.
A. cos x B. sin2 x C. cos2 x D. sin x
Solve.A whispering gallery is a room in the shape of an elliptic reflector. If a source of sound is placed at one focal point of an elliptic reflector, the sound is reflected through the other focal point. If one person speaks at one focal point, then another person at the other can hear sounds as faint as a whisper. If the whispering gallery is based on the ellipse 
+ 
= 1, how many units from the center of the ellipse would the two people stand?
A. 5 units B. 4 units C. 3 units D. 16 units
Find an equation for the line with the given properties.The solid line L contains the point (2, 4) and is perpendicular to the dotted line whose equation is 
Give the equation of line L in slope-intercept form.
A. y = - 
x + 5
B. y - 4 = - 
(x - 2)
C. y - 4 = 2(x - 2)
D. y = 
x + 5