Hello.

A) less than 244 days

B) more than 275 days

C) over 300 days

D) between 260 and 280 days

A) You need to find

B)

C) [/tex]

D)

You said it is a normal distribution; so

= mean

= standard deviation

Well, I must admit, I have absolutely no clue, if this is okay or not; but it seemed to bevery important for you

Raphai really need help on these problems !