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A new roller coaster at an amusement park requires individuals to be at least 4'...

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A new roller coaster at an amusement park requires individuals to be at least 4' 8" (56 inches) tall to ride. It is estimated that the heights of 10-year-old boys are normally distributed with u=54.0 inches and o=4 inches.a. What proportion of 10-year-old boys is tall enough to ride the coaster?b. A smaller coaster has a height requirement of 50 inches to ride. What proportion of 10-year-old boys is tall enough to ride this coaster?c. What proportion of 10-year-old boys is tall enough to ride the coaster in part b but not tall enough to ride the coaster in part a?

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