Simplify the complex number and write it in standard form.
?
?
A. -1
B. ?-i
C. ?1
D. ?i
E. 5
Answer: B
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Describe the given set of points with a single equation or with a pair of equations.The plane perpendicular to the y-axis and passing through the point (-9, -4, -4)
A. x - 4 + z = 0 B. x = -9 and z = -4 C. -9x - 4z = 0 and y = -4 D. y = -4
Use the graph of population change per year for a metro area to answer the question. 
In which year did the population of the metro area decrease the most?
A. 2005 B. 1995 C. 1997 D. 2000
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.sin ? = - 
, 
< ? < 2?Find sin 
.
A. - 
B. - 
C. 
D. 
If a projectile is fired with an initial speed of  figure 1.png)
ft/s at an angle ? above the horizontal, then its position after t seconds is given by the parametric equations x = ( figure 1.png)
cos?)t and y = ( figure 1.png)
sin?)t - 16t² where x and y are measured in feet. Suppose a gun fires a bullet into the air with an initial speed of 1024 ft/s at an angle of 30° to the horizontal. How far from the gun will the bullet hit the ground?
(a) 2.3 mi (b) 3.2 mi (c) 28.8 mi (d) 4.5 mi (e) 5.4 mi