A PDF for a continuous random variable X is given. Use the PDF to find the indicated probability.Find P(2 ? x ? 5).f(x) = 
A. 0.42
B. 0.09
C. 0.21
D. 0.03
Answer: C
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The amount M, in billions of dollars, collected by the Internal Revenue Service t years after 2003 is given by
.
?
According to this model, in what year would IRS collections reach 3,554 billion dollars?
A. 2014 B. 2012 C. 2010 D. It never happens
Refer to the figures and recursive rules below to answer the following question(s).
Which of the figures above approximates the result of recursively applying Rule E infinitely many times?
A. Figure 4 B. Figure 3 C. Figure 2 D. Figure 1 E. none of these
Solve the problem.A certain radioactive isotope decays at a rate of 0.175% annually. Determine the half-life of this isotope, to the nearest year.
A. 396 yr B. 172 yr C. 4 yr D. 286 yr
Sketch the graph of the function. Label at least three points.f(x) = x3
A. 
B. 
C. 
D. 