Answer the question based on the following situation:An honest coin is tossed 1600 times. The random variable X denotes the total number of heads that come up in the 1600 tosses.What are the chances that X is 800 or less?
A. approximately 50%
B. approximately 100%
C. approximately 40%
D. approximately 0%
E. none of these
Answer: A
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The graph of a quadratic function is given. Find the standard form of the function
A. f(x) = -(x - 1)2 - 4 B. f(x) = (x + 1)2 - 4 C. f(x) = -(x + 1)2 + 4 D. f(x) = -(x + 1)2 - 4
Solve the problem.Suppose the following matrix represents the input-output matrix of a primitive economy that depends on two basic goods, yams and pigs. How much of each commodity should be produced to get 12 bushels of yams and 14 pigs? (It is not necessary to round to a whole-number quantity of pigs.)
A. 21.5 bushels of yams and 29.25 pigs B. 21.5 bushels of yams and 24.75 pigs C. 28.5 bushels of yams and 18.75 pigs D. 33.75 bushels of yams and 18.75 pigs
Find the focus and the equation of the directrix of the following parabola.x2 + 8x + 4y + 4 = 0
A. Focus (-4, 2), directrix y = 4 B. Focus (0, 2), directrix y = 2 C. Focus (2, 4), directrix y = 6 D. Focus (-4, 1), directrix y = 2 E. Focus (2, 0), directrix y = 4
Solve the problem.The function A(x) = 1.06x - .02x3 gives the approximate alcohol level (in tenths of a percent) in a person's blood x hours after drinking about 8 ounces of 100-proof whiskey. What would the person's alcohol level be 3 hours after drinking? Give answer as a percent.
A. 0.280% B. 0.264% C. 2.64% D. 2.80%