The amount of time needed for a certain machine to process a job is a random variable with mean exi=10 minutes and var(xi)=2 minutes2. the times needed for different jobs are independent from each other. find the probability that the machine processes less than or equal to 40 jobs in 7 hours.

Astore manager records the total visitors and sales, in dollars, for 10 days. the data is shown in the scatter plot. what conclusion can the store manager draw based on the data? question 3 options: an increase in sales causes a decrease in visitors. an increase in sales is correlated with a decrease in visitors. an increase in visitors is correlated with an increase in sales.

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Use δjkl and δmpn to determine whether don's claim is true or false. which of the following should don use to prove the triangles are similar? sss sas aas aa