Write the expression in the form a + bi, where a and b are real numbers.
A. -5i
B. 5
C. 5i
D. 25i
Answer: B
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Solve the problem.A survey of a group of 115 tourists was taken in St. Louis. The survey showed the following:66 of the tourists plan to visit Gateway Arch;50 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;8 plan to visit the Art Museum, the zoo, and the Gateway Arch;14 plan to visit none of the three places.How many plan to visit the Art Museum only?
A. 101 B. 12 C. 38 D. 50
State the value of the discriminant and the number of real solutions.5y2 = -8y - 6
A. 0, one B. -56, no real solutions C. 56, two D. 56, one
Solve the problem.Suppose the cost per ton, y, to build an oil platform of x thousand tons is approximated by 
What is the cost per ton for 
A. $637.50 B. $68,000.00 C. $100,000.00 D. $340.00
Find the mean. Round to the nearest tenth.Value Frequency 124 2 187 3 222 4 307 2 358 3
A. 282.1 B. 85.6 C. 241.8 D. 306.7