Multiply or divide as indicated.
? 
A. 
B. - 
C. 1
D. - 
Answer: B
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Evaluate the improper integral or state that it diverges.
A. 24 B. -24 C. -48 D. diverges
Find an explicit rule for the nth term of the sequence.7, -7, 7, -7, ...
A. an = 7 ? (-1)n-1 B. an = 7 ? 1n+1 C. an = 7 ? (-1)n D. an = 7 ? 1n-1
Identify any intercepts and test for symmetry. Then sketch the graph of the equation. ? y = 2 - |x| ?
A. x- intercept: (±2, 0)
y- intercept: (0, 2)
y-axis symmetry
?
?
B. x- intercept: (-2, 0)
y- intercept: (0, 2)
y-axis symmetry
C. x- intercept: (2, 0)
y- intercept: (0, ±2)
y-axis symmetry
D. x- intercept: (2, 0)
y- intercept: (0, 2)
y-axis symmetry
E. x- intercept: (-2, 0)
y- intercept: (0, 2)
y-axis symmetry
Solve the problem.The change in a certain engineer's salary over time can be approximated by the linear equation 
where y represents salary in dollars and x represents number of years on the job. According to this equation, after how many years on the job was the engineer's salary $64,000?
A. 13 years B. 10 years C. 11 years D. 12 years