Find the equation of the parabola described.Focus at (-3, 5); directrix the line y = 1
A. (x - 3)2 = 8(y + 3)
B. (x + 3)2 = 8(y + 3)
C. (x + 3)2 = 8(y - 3)
D. (x - 3)2 = 8(y - 3)
Answer: C
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Use sets to solve the problem.A survey of a group of 117 tourists was taken in St. Louis. The survey showed the following:66 of the tourists plan to visit Gateway Arch;49 plan to visit the zoo;11 plan to visit the Art Museum and the zoo, but not the Gateway Arch;14 plan to visit the Art Museum and the Gateway Arch, but not the zoo;19 plan to visit the Gateway Arch and the zoo, but not the Art Museum;7 plan to visit the Art Museum, the zoo and the Gateway Arch;16 plan to visit none of the three places.How many plan to visit the Art Museum only?
A. 101 B. 37 C. 12 D. 49
Solve.A student scored 71, 80, and 96 on three algebra tests. What must he score on the fourth test in order to have an average grade of at least 85?
A. 82 B. 29 C. 62 D. 93
Suppose X is a random variable whose probabilities are Poisson distributed with pn = 
e-14. Which of the following is true?
A. The probability that x = 0 is zero. B. The expected value of X is e-14. C. The probability that x = 14 is approximately 0.1060. D. The standard deviation of X is 14.
Write the following in exponential form. Assume that all variables represent positive values.
A. 25/6 B. 2-5/6 C. 2-6/5 D. 26/5