(Answered) The length of horse pregnancies from conception to birth

Statistics

The length of horse pregnancies from conception to birth varies according to a roughly Normal distribution with mean 336 days and standard deviation 4 days. Use the 68-95-99.7 rule to answer the following questions:

(a) Almost all (95%) horse pregnancies fall within what range of lengths?

(b) What percent of horse pregnancies are less than 328 days?

(d) What percentage of horse pregnancies are between than 332 and 344 days? Please show work

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