Determine whether (f ? g)(x) = x and whether (g ? f)(x) = x.f(x) = 
, g(x) = x2
A. No, yes
B. No, no
C. Yes, yes
D. Yes, no
Answer: B
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Transform the polar equation to an equation in rectangular coordinates. Then identify and graph the equation.r = 4 sin ?
A. (x - 2)2 + y2 = 4; circle, radius 2,
center at (2, 0) in rectangular
coordinates
B. (x + 2)2 + y2 = 4; circle, radius 2,
center at (-2, 0) in rectangular
coordinates
C. x2 + (y + 2)2 = 4; circle, radius 2,
center at (0, -2) in rectangular
coordinates
D. x2 + (y - 2)2 = 4; circle, radius 2,
center at (0, 2) in rectangular
coordinates
Use a sum or difference identity to find the exact value.sin 
cos 
- cos 
sin 
A. 
B. 
C. 1
D. 
An empty lot is 1,500 ft by 11,200 ft. How many feet would you save by walking diagonally across the lot instead of walking the length and width? ? __________ ft
Fill in the blank(s) with the appropriate word(s).
A substance has a hydrogen ion concentration of  figure 1.png)
. Find the pH of the substance.
 figure 2.png)