The price of a gallon of milk follows a normal distribution with a mean of $3.20 and a standard deviation of $0.10. What proportion of the milk vendors have prices that were less than $3.12 per gallon

Step-by-step explanation:

Mean

Standard deviation

Estimated price

Generally the equation for P(x<3.12) is mathematically given by

Since from Z table

Therefore the  proportion of the milk vendors that have prices that were less than $3.12 per gallon is

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.