Simplify the factorial expression.
A. 
B. 
C. 
D. 
Answer: B
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Perform the indicated operations. Express the answer as a single polynomial in standard form.11x2(-10x + 11)
A. 11x2 B. -110x3 + 11 C. -110x3 + 121x2 D. -110x + 121
Multiply and simplify.18 
A. 
B. -162
C. -2
D. 2
Solve the problem.In a Psychology class, the students were tested at the end of the course on a final exam. Then they were retested with an equivalent test at subsequent time intervals. Their average scores after t months are given in the table.
Using a graphing utility, fit a logarithmic function y = a + b ln x to the data. Using the function you found, estimate how long will it take for the test scores to fall below 84%. Express your answer to the nearest month.
A. 8 months B. 12 months C. 20 months D. 10 months
Multiply and then, if possible, simplify by factoring.
A. 2x4y4
B. 2
C. 4x8y8
D. 2x4y4