Solve the problem.The city council of a small town needs to determine if the town's residents will support the building of a new library. The council decides to conduct a survey of a sample of the town's residents. Which one of the following procedures would be most appropriate for obtaining a sample of the town's residents?
A. Survey a random sample of persons within each neighborhood of the town.
B. Survey 400 individuals who are randomly selected from a list of all people living in the state in which the town is located.
C. Survey every 11th person who enters the old library on a given day.
D. Survey a random sample of librarians who live in the town.
Answer: A
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A. 0.43 B. 43,000 C. 4300 D. 0.043
Solve.A carpenter bought miscellaneous hardware that totalled $37.65. After paying sales tax, his total cost was $39.72. What was the sales tax percentage?
Fill in the blank(s) with the appropriate word(s).
Determine the coordinates of the indicated point on the graph. 
E
A. (4, 2) B. (3, 4) C. (4, 3) D. (3, -4)
Solve the problem.Suppose that one box contains n balls, of which 7 are red. A second box contains 
balls, of which n are red. If you select a ball from each box, the probability of not drawing a red ball from the first box and a red ball from the second box is 
? 
. Simplify this expression.
A. 
B. 
C. 
D. 