Answer:
1/2
Step-by-step explanation:
I just did the problem on edgenuity.
Answer:
a) 0.3277
b) 0.0128
Step-by-step explanation:
We are given the following information in the question:
N(2750, 560).
Mean, μ = 2750
Standard Deviation, σ = 560
We are given that the distribution of distribution of birth weights is a bell shaped distribution that is a normal distribution.
Formula:

a) P (less than 2500 grams)
P(x < 2500)

Calculation the value from standard normal z table, we have,

b) P ((less than 1500 grams)
P(x < 1500)

Calculation the value from standard normal z table, we have,

315% is roughly 0.0382 of 82.53.
On the other hand, 315% of 82.53 is 259.9695 .
It is false or 8/9 is equal to 1