Solve the problem.Among patients who were improving on a certain day (in the critical care unit of a certain hospital), the following was determined to be true on the next day: 58% were still improving; 10% were stable; 7% were deteriorating; and 25% had been discharged. Among the patients who were stable on a certain day, the following was determined to be true on the next day: 34% were improving; 43% were still stable; 19% were deteriorating; 3% had been discharged; and 1% had died. Among the patients who were deteriorating on a certain day, the following was determined to be true on the next day: 10% were improving; 42% were stable; 44% were still deteriorating; none had been discharged; and 4% had died. What is the expected number of additional days that a patient, who is stable on
that certain day, will spend in the critical care unit? Round your answer to the nearest hundredth.
A. 5.83 days
B. 7.36 days
C. 4.31 days
D. 8.25 days
Answer: D
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Find a Cartesian equation for the line whose polar equation is given.r cos
= 2
A. y = 
x - 2
B. y = 
x + 4
C. y = 
x - 2
D. y = x - 4
If Z = ûXC + XL, find Z when Xc = 30 ê and XL = 40 ê.
ÚÄÄÄÄÄÄÄÄ ³ 2 2 a. 8.4 ê b. 120 ê c. 70 ê d. 50 ê e. 100 ê
Subtract and simplify.
- 
A. 
B. 
C. 
D. 
Solve the problem.The paired data below consist of the test scores of 6 randomly selected students and the number of hours they studied for the test. By using linear regression, the following function is obtained: 
where x is number of hours studied and y is score on the test. Use this function to predict the score on the test of a student who studies 5 hours. 
A. 77.7 B. 67.7 C. 72.7 D. 74.8