The fossils of a type of flying dinosaur, pterodactyl, were studies and it was found that the wing span of these dinosaurs had a mound shaped distribution with mean 20 feet and standard deviation 5 feet. What would be your guess about the proportion of pterodactyls that had wings between 5 and 30 feet long? O A. 0.995 O B. 0.974 O C. 0.950 OD0997

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