Use an identity to write the expression as a single trigonometric function or as a single number.± 
A. cos 76?
B. sin 19?
C. cos 19?
D. sin 76?
Answer: C
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Find the center (h, k) and radius r of the circle. Graph the circle.(x + 5)2 + y2 = 16
A. (h, k) = (-5, 0); r = 4
B. (h, k) = (-5, 0); r = 16
C. (h, k) = (0, 5); r = 16
D. (h, k) = (5, 0); r = 4
Find the intervals on which the function is increasing and the intervals on which the function is decreasing.f(x) = 
x2 - 4x - 
A. Increasing on (4, ?) , decreasing on (-?, 4)
B. Increasing on (-2, ?) , decreasing on (-?, -2)
C. Increasing on 
; decreasing on 
D. Increasing on 
; decreasing on 
Solve the compound inequality. Graph the solution set.f(x) ? 6 or f(x) ? 14, where f(x) = 4x - 2
A. 
B. 
C. 
D. 
Solve the problem.A satellite is to be put into an elliptical orbit around a moon. The moon is a sphere with radius of 768 km. Determine an equation for the ellipse if the distance of the satellite from the surface of the moon varies from 764 km to 223 km.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1