Pregnancy length (in days) has a normal probability distribution with a mean of 266 days and a standard deviation of 16 days. what is the length of the pregnancy that marks the start of the 25th percentile? enter a number rounded to two decimal places. do not enter the units.

264.20

Step-by-step explanation:

Let X be the pregnancy length (in days)

Then X is N(266,16)

We can convert X to Z by

is N(0,1)

25th percentile for Z is

-0.675

Convert back to x score

25th percentile is 264.20

the answer is 15% decrease

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer