Identify the conic that the polar equation represents. Also, give the position of the directrix.r = 
A. ellipse, directrix parallel to the polar axis 
above the pole
B. ellipse, directrix parallel to the polar axis 
below the pole
C. ellipse, directrix perpendicular to the polar axis 
left of the pole
D. ellipse, directrix perpendicular to the polar axis 
right of the pole
Answer: B
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Solve the equation on the interval [0, 2?).sin 4x = 
A. 0, 
, ?
B. 
, 
C. 
, 
, 
, 
, 
, 
, 
, 
D. 0
State whether the function is an exponential growth function or exponential decay function, and describe its end behavior using limits.f(x) = 45x
A. Exponential decay function; 
f(x) = 0; 
f(x) = ?
B. Exponential decay function; 
f(x) = ?; 
f(x) = 0
C. Exponential growth function; 
f(x) = 0; 
f(x) = ?
D. Exponential growth function; 
f(x) = ?; 
f(x) = 0
Solve.Police use the formula s = 
to estimate the speed s of a car in miles per hour, where d is the distance in feet that the car skidded and f is the coefficient of friction. If the coefficient of friction on a certain dry road is 0.88 and a car was traveling on it at a rate of 
how far will the car skid? (Round to the nearest foot.)
A. 422 ft B. 53 ft C. 61 ft D. 32 ft
Factor the polynomial completely. If the polynomial cannot be factored, write "prime."5x2 - 24x + 27
A. (5x - 9)(5x + 3) B. 5(x - 9)(x - 3) C. (5x + 3)(x - 9) D. (5x - 9)(x - 3)