Multiply mentally.80 × 400
A. 31,600
B. 32,400
C. 480
D. 32,000
Answer: D
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Multiply or divide as indicated. Write the answer in lowest terms. 
? 
A. 
B. 
C. 
D. 
Evaluate the expression.36
A. 18 B. 324 C. 72.9 D. 729
Solve the problem.How many 9-symbol codes can be formed using 5 different symbols? Repeated symbols are allowed.
A. 126 B. 1,953,125 C. 15,120 D. 3024
Solve the problem. The following table shows the number of adults in a certain city who approve of the mayor's performance in various years. It also gives the total number of adults in the city in the same years. 
Let p be the percentage of adults in the city who approve of the mayor's performance in the year that is t years since 1980. A reasonable model of the situation is: p = 
Use this model to estimate when 29% of adults in the city will approve of the mayor's performance.
A. 2010 B. 2008 C. 2013 D. 2012