The weekly salaries of elementary school teachers in one state are normally distributed with a mean of $490 and a standard deviation of $45. If one elementary school teacher is randomly selected, what is the probability that he/she earns less than $450 a week?

The probability is

Step-by-step explanation:

From the question we are told that

    The mean is  

     The standard deviation is  

Generally the probability that he/she earns less than $450 a week is mathematically represented as

From the z table  the area under the normal curve to the left corresponding to    -0.8889  is

=>    

answer: ok

step-by-step explanation:

answer: evaluate the objective function at each vertex to determine which - and -values, if any, maximize or minimize the function. example: find the minimum value and maximum value of the objective function f ( x , y ) = 4 x + 5 y , subject to the following constraints