The fracture strength of a certain type of manufactured glass is normally distributed with a mean of

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The fracture strength of a certain type of manufactured glass is normally distributed with a mean of 579 MPa with a standard deviation of 14 MPa.
(a) What is the probability that a randomly chosen sample of glass will break at less than 579 MPa?
(b) More than 590 MPa?
(c) Less than 600 MPa?
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