COF A normal distribution curve, where x = 70 and o = 15,
was created by a teacher using her students' grades.
What information about their performances can be
obtained by analyzing the curve?

From this info and using the empirical rule we know that we will have about 68% of the scores between:

95 % of the scores between:

And 99.7% of the values between

Step-by-step explanation:

For this problem we can define the random variable of interest as "the student grades" and we know that the distribution for X is given by:

From this info and using the empirical rule we know that we will have about 68% of the scores between:

95 % of the scores between:

And 99.7% of the values between

to determine the unit cost your would divide the total cost by the number sold.

7 bagels for $4.41       $4.41/7 = $.63 each at fresh side

5 bagels for $3.60         $3.60/5 = $.72 each at value mart

(5x-1)^2= (5x)^2-2(5x)×1+(1)^2=25x^2-10x+1