The weights of newborn babies are distributed normally, with a mean of approximately 105 oz and a standard deviation of 10 oz. if a newborn baby is selected at random, what is the probability that the baby weighs more than 75 oz

0.9987

Step-by-step explanation:

Given : The weights of newborn babies are distributed normally, with a mean of approximately 105 oz and a standard deviation of 10 oz.

i.e.  and

Let x represents the weights of newborn babies.

If a newborn baby is selected at random, then the probability that the baby weighs more than 75 oz will be :-

  [using z-value table]

Hence, the required probability = 0.9987

answer: (-8,4) are the coordinates of a

step-by-step explanation:

let the side of square abcd is x .

thus the area of square abcd is .

now, by the diagram area of triangle ead= 1/2 × ea × ad = 1/2 × ea × x

( because ad is the side of square)

and, according to the question,

the areas of square abcd and right ead are equal.

⇒

⇒ea=2x

thus, ea: ab=2: 1

therefore, point a divides line segment eb into the ratio 2: 1.

⇒ by sectional formula coordinates of a are,

=

=

=(-8, 4)

thus the coordinates of a are (-8,4)