Divide.
A. -2 + 
i
B. 
+ 2i
C. 2 - 
i
D. - 
- 2i
Answer: A
Mathematics
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The torsion of a curve defined by r(t) is given by  Figure 3.png)
. Find the torsion of the curve defined by r(t) = cos7ti+sin7tj+4tk.
What will be an ideal response?
Mathematics
Factor the polynomial by grouping.2x4 - 9x2 + 4x2 - 18
A. (2x2 + 2)(x2 - 9) B. (x + 2)(9x - 2) C. prime D. (x2 + 2)(2x2 - 9)
Mathematics
Use the tree diagram to find the requested probability.Find P(X?A). Give your answer as a decimal and round your answer to three decimal places if necessary. 
a = 0.9, b = 0.1, c = 0.8, d = 0.2, e = 0.6, f = 0.4
A. 0.514 B. 0.72 C. 0.923 D. 0.8
Mathematics
Multiply. Assume that all variables represent positive values.(7
- 3)2
A. 7x - 42
+ 9
B. 49x2 + 9
C. 49x - 42
+ 9
D. 49x2 - 42
+ 9
Mathematics