Write the complex number in polar form. Express the argument ? in degrees, with 0 ? ? ? 360°.-
- i
A. 
(cos 315° + i sin 315°)
B. 
(cos 225° + i sin 225°)
C. 
(cos 45° + i sin 45°)
D. 
(cos 135° + i sin 135°)
Answer: B
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Write the system in the form 
Then solve the linear system by computing 
with a calculator. Round numbers to the nearest tenth, as necessary.1.9x - 0.5y + 2.2z = 3.95.3x - 7.0y - 0.5z = -5.02.5x - 5.0y - 1.2z = -1.4
A. (-42.4, -29.6, 44.1) B. (-10.6, -7.4, 11.0) C. (-5.3, -3.7, 5.5) D. (-21.2, -14.8, 22.1)
Find the expected value.Suppose that 1,000 tickets are sold for a raffle that has the following prizes: one $300 prize, two $100 prizes, and one hundred $1 prizes. What is expected value of a ticket?
A. $300 B. $0.60 C. $1 D. $100
Use translations of one of the basic functions defined by y = x2, y = x3, y = 
, or y = 
to sketch a graph of y = f(x) by hand. Do not use a calculator.y = x3 + 4
A. 
B. 
C. 
D. 
Multiply and simplify.12 ? 
A. 
B. 144
C. 1
D. 