Find the quadratic approximation of f at x = 0.f(x) = ln(cos 10x)
A. Q(x) = - 50x2
B. Q(x) = 1 - 50x2
C. Q(x) = 1 + 50x2
D. Q(x) = 50x2
Answer: A
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Solve the problem.An auto mechanic finds that the interval time I, in minutes, between scheduled appointments must be related to the total number of minutes T that he is open each day and the number of scheduled oil changes N according to the formula 
If he wants to be open 9 hours each day, and feels that he can do each oil change in 20 minutes, how many appointments should he make in one day?
A. 2 B. 29 C. 145 D. 0
Plot the given point in the rectangular coordinate system.(1, 6)
A. 
B. 
C. 
D. 
Convert the angle to degrees, minutes, and seconds.175.27°
A. 175°17'12" B. 175°16'12" C. 175°16'27" D. 175°14'27"
Use basic identities to simplify the expression.
A. sec2? B. sin ? C. tan2? D. cos3?