Let X be a continuous random variable A ? X ? B and let f (x) be its probability density function and F (x) its cumulative distribution function. Indicate whether the following statements are true or false.f(A) = 0, f(B) = 1
A. True
B. False
Answer: B
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Solve the problem.An office contains 1000 ft3 of air initially free of carbon monoxide. Starting at time = 0, cigarette smoke containing 4% carbon monoxide is blown into the room at the rate of 0.5 ft3/min. A ceiling fan keeps the air in the room well circulated and the air leaves the room at the same rate of 0.5ft3/min. Find the time when the concentration of carbon monoxide reaches 0.01%.
A. 7.01 min B. 6.01 min C. 8.01 min D. 5.01 min
Find the x- and y- intercepts.-x + 
y = -5
A. (8, 0), (0, -5) B. (5, 0.5), (0, -8) C. (-5, 0), (0, -8) D. (5, 0), (0, -8)
Solve the application.In a recent survey, 
of those surveyed said pizza is their favorite food, while 
said pasta was their favorite. What fraction selected a food other than these two as their favorite food?
A. 
chose other
B. 
chose other
C. 
chose other
D. 
chose other
Find the sum of the first 19 positive integers.
Fill in the blank(s) with the appropriate word(s).