Write the number in trigonometric form. Let 0° ? ? < 360°.2
+ 2i
A. 4(cos 60° + i sin 60°)
B. 4(cos 330° + i sin 330°)
C. 4(cos 150° + i sin 150°)
D. 4(cos 30° + i sin 30°)
Answer: D
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Find the center and the radius of the circle.x2 + y2 - 6x - 12y + 36 = 0
A. (3, 6); r = 3 B. (-3, -6); r = 3 C. (3, -6); r = 3 D. (-3, 6); r = 3
Find the intervals on which the function is continuous.y = 
A. discontinuous only when x = 15 B. continuous everywhere C. discontinuous only when x = -24 D. discontinuous only when x = -3
Solve the problem.From a thin piece of cardboard 30 in. by 30 in., square corners are cut out so that the sides can be folded up to make a box. What dimensions will yield a box of maximum volume? What is the maximum volume? Round to the nearest tenth, if necessary.
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Find the exact value of the expression.sin 265° cos 25° - cos 265° sin 25°
A. - 
B. 
C. 
D. - 