Acollege-entrance exam is designed so that scores are normally distributed with a mean of 500 and a standard deviation of 100. what percent of exam scores are between 400 and 600? __% of exam scores are between 400 and 600.

68% of exam scores lie within one std. dev. of the mean

Step-by-step explanation:

Because the standard deviation is 100, one standard deviation above the mean comes out to 600.  Likewise, one std. dev. below the mean comes out to 400.  By the Empirical Rule, 68% of exam scores lie within one std. dev. of the mean.

Step-by-step explanation:

We know that the average is:

The standard deviation is:

The Z-score is:

We seek to find

P(400<x<600)

This is:

Looking for the value of z in a normal table we have to:

So

c 1 hour

step-by-step explanation:

m = 2e

m = 2 so 2 = 2e

1 = e

plants store their excess carbohydrate in the form of starch so that it could be used as energy source later on. the excess carbohydrate is converted into starch in the plastid i.e. chloroplast & this process occurs in the presence of sunlight. it is an insoluble polymer of glucose which gets stored in cell organelles named as amyloplasts. in some plants, starch is also stored in roots and embryos.