The length of a phone conversation is normally distributed with a mean of 4 minutes and a standard deviation of .6 minutes. what is the probability that a conversation lasts longer than 5 minutes?
a. 0.04746
b. 0.45254
c. 0.54746
d. 0.95254

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^

1.3 million hoops i believe

you can use a^2+ b^2=c^2