Evaluate f(7) *
f (x) = –2x² + 4
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True or false? many triangular shapes can be circumscribed about a given circle
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Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?
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