Write the complex number in trigonometric form, using degree measure for the argument.4
A. 4(cos 90° + i sin 90°)
B. 4(cos 270° + i sin 270°)
C. 4(cos 180° + i sin 180°)
D. 4(cos 0° + i sin 0°)
Answer: D
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Complete.1847 g = 
kg
A. 0.01847 B. 0.1847 C. 1.847 D. 18.47
Substitute to find the value of the expression.A train must cover a distance of 2520 miles. The velocity, in miles per hour, of the train is 
where t is the time, in hours, to complete the trip. If the train completes the trip in 28 hours, what is its velocity?
A. 0.01 mph B. 90 mph C. 85 mph D. 70,560 mph
Multiply.(x2 - 10) (x3 + 10x - 5)
A. x6 - 5x2 + 100x + 50 B. x5 - 20x3 - 5x2 + 100x + 50 C. x6 - 20x3 - 5x2 - 100x + 50 D. x5 - 5x2 - 100x + 50
Use the intermediate value theorem to show that the polynomial has a real zero between the given values of a and b.a = -1 and b = 0f(x) = -6x4 - 8x2 + 9
A. f(-1) = 5 and f(0) = -9 B. f(-1) = -5 and f(0) = 9 C. f(-1) = 5 and f(0) = 9 D. f(-1) = -4 and f(0) = 10