Write the complex number in trigonometric form. Round the angle to the nearest hundredth of a degree.
?

?
A.
B. ?
C. ?
D. ?
E. ?
Answer: D
Mathematics
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Find a ? b.a = 2i + 2j, b = -2.5i - 3j
A.
B. -11
C.
D. -1
Mathematics
Solve. +
= -
A. x = -
B. x = -
C. x =
D. x =
Mathematics
Write out the first five terms of the sequence.an = n2 - n
A. 2, 6, 12, 20, 30 B. 0, 3, 8, 15, 24 C. 0, 2, 6, 12, 20 D. 1, 4, 9, 16, 25
Mathematics
Solve the problem.In the following formula, y is the minimum number of hours of studying required to attain a test score of x: How many hours of study are needed to score 90? Round your answer to the nearest hundredth, if necessary.
A. 2.74 hr B. 7.85 hr C. 27.40 hr D. 101.14 hr
Mathematics