how would i do about this problem can someone explain it to me or show me because i keep getting weird answers with an e at the end. It makes no sence.

This question is: The length of human pregnancies from conception to birth varies according to a distrubition that is approximately normal with mean 266 days and standard deviation 16 days. Call the length of a randomly chosen pregnancy Y. What is P(Y>300)?

4

how did you get 4 ?