What is the distance KL+KO=

Distance KL + KO = 5 + 7 = 12

Step-by-step explanation:

To find distance KL + KO, first find the distance of KL and KO, then add both together.

Distance KL:

Coordinate of K = -7

Coordinate of L = -2

KL = |-7 -(-2)| = |-7 + 2| = 5

Distance KO:

Coordinate of K = -7

Coordinate of O = 0

KO = |-7 - 0| = |-7| = 7

Distance KL + KO = 5 + 7 = 12

The probability of a pregnancy longer than 307 days is P=0.00317=0.3%.

The pregnancy length that separates premature babies from those who are not premature is 238 days.

Step-by-step explanation:

a) To find the probability of a pregnancy lasting more than 307 days, we calculate the z-value and then calculate the probability in a standard normal distribution table.

The probability of a pregnancy longer than 307 days is P=0.00317=0.3%.

b) First, we have to know the z-value that P(z<z₁)=0.03. This value of z is z=-1.88.

Then we can calculate the cut off value for the pregnancy days as:

The pregnancy length that separates premature babies from those who are not premature is 238 days.