Write the complex number in polar form. Express the argument ? in degrees, with 0 ? ? ? 360°.12 + 16i
A. 20(cos 306.9° + i sin 306.9°)
B. 20(cos 126.9° + i sin 126.9°)
C. 20(cos 53.1° + i sin 53.1°)
D. 20(cos 233.1° + i sin 233.1°)
Answer: C
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Solve.
(r + 6) = 
(r + 8)
A. 4 B. 3 C. -4 D. -12
Solve by graphing.During the month of January 1997, the depth of snow y (in inches) at the base of one ski resort could be approximated by the linear equation 
where x is the number of days since December 31st. Graph the equation and use the graph to estimate the depth of snow on January 30th. 
A. 12 inches B. 7 inches C. 37 inches D. 15 inches
Use graphs and tables to find the limit and identify any vertical asymptotes.
A. ? ; x = 5 B. ? ; x = -5 C. -? ; x = -5 D. 1 ; no vertical asymptotes
Use a calculator to solve the equation on the interval [0, 2?). Round the answer to two decimal places.tan x = 3.3
A. 1.28, 2.85 B. 1.28, 5.00 C. 1.28, 4.42 D. 1.28, 1.86