Write the complex number in polar form.1 + 3j
A. 
(cos 71.62° + j sin 71.62°)
B. (cos 71.62° + j sin 71.62°)
C. 4(cos 71.62° + j sin 71.62°)
D. 
(cos 71.62° + j sin 71.62°)
Answer: A
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Round the decimal to the indicated place value.1.91472
ten-thousandth
A. 1.916 B. 1.9147 C. 1.915 D. 1.914
Simplify.7(
) + 
(
)
A. 122
B. 
C. 46
D. 
Use Bayes' rule to find the indicated probability.The incidence of a certain disease on the island of Tukow is 4%. A new test has been developed to diagnose the disease. Using this test, 91% of those who have the disease test positive while 4% of those who do not have the disease test positive (false positive). If a person tests positive, what is the probability that he or she actually has the disease?
A. 0.438 B. 0.487 C. 0.91 D. 0.856
Multiply.14(-14)
A. -196 B. 196 C. -210 D. 210