A card is drawn from a standard deck of cards. Expressing your answer as a fraction in simplest form, what is the probability of getting the specified card?a red card.
A. 
B. 
C. 
D. 
Answer: C
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Perform the indicated operation. Write the answer in the form a + bi.
2
A. 
- 
i
B. 
+ 
i
C. - 
+ 
i
D. - 
- 
i
Use Descartes' Rule of Signs to determine how many positive and how many negative real zeros the polynomial can have. Then determine the possible total number of real zeros.
?
?
A. 2 positive, 2 negative B. 2 or 4 positive C. 3 complex D. 0, 2 or 4 negative E. 4 negative
Find the modulus of the complex number.2 + 3i
A. 13
B. 
C. 
D. 
A medical test has been designed to detect the presence of a certain disease. Among those who have the disease, the probability that the disease will be detected by the test is 0.99. However, the probability that the test will erroneously indicate the presence of the disease in those who do not actually have it is 0.02. It is estimated that 7% of the population who take this test have the disease.
If necessary, round your answers to three decimal places. If the test administered to an individual is positive, what is the probability that the person actually has the disease? __________ If an individual takes the test twice and both times the test is positive, what is the probability that the person actually has the disease? __________