Solve the problem.The amount of Jen's monthly phone bill is normally distributed with a mean of $55 and a standard deviation of 
. Within what range are 68% of her phone bills?
A. Between $37 and $55
B. Between $37 and 73
C. Between $46 and $64
D. Between $55 and $64
Answer: C
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Find the exact value of the sum.sin 
- sin 
A. - 
B. - 
C. - 
D. - 
Provide an appropriate response.A student is trying to solve the equation (x + 9)(x - 6) = 6. The student has set x + 9 = 6 and x - 6 = 6 and found that two solutions x = -3, x = 12. The student checks his or her results by plugging in his or her solutions into the original equation and finds that they do not work. How would you advise him or her?
What will be an ideal response?
Graph the ellipse and locate the foci.
+ 
= 1
A. foci at (
, 0) and (-
, 0)
B. foci at (0, 
) and (0, -
)
C. foci at (
, 0) and (-
, 0)
D. foci at (2
, 0) and (-2
, 0)
For the given functions f and g , find the indicated composition.f(x) = 3x + 13,g(x) = 4x - 1(f?g)(x)
A. 12x + 12 B. 12x + 10 C. 12x + 16 D. 12x + 51