P(N = 3); N is Poisson (2.3).
Find the probability for the given random variable
0.203308
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Solve the given equation for x.y = 7 cos-1 
A. x = 4 cos 7y
B. x = 4 sin 7y
C. x = 7 cos 
D. x = 4 cos 
State the domain of the rational function.f(x) = 
A. (-?, -5) ? (-5, ?) B. (-?, 5) ? (5, ?) C. (-?, 7) ? (7, ?) D. (-?, - 5) ? (- 5, 5) ? (5, ?)
Find the domain and range of the function represented in the graph.
A. Domain: (-?, ?); Range: (-?, ?) B. Domain: (-?, ?); Range: [-4, ?) C. Domain: [-1, ?); Range: [-4, ?) D. Domain: (-?, -1) or (-1, ?); Range: (-?, -4) or (-4, ?)
Solve the problem.How long will it take a sample of radioactive substance to decay to half of its original amount, if it decays according to the function A(t) = 200e-0.227t, where t is the time in years? Round to the nearest hundredth year.
A. 23.34 yr B. 3.05 yr C. 45.40 yr D. 26.39 yr