The average life of a brand of automobile tires is 30,000 miles, with a standard deviation of 2,000 miles. if a tire is selected and tested, find the probability that it will have a lifetime between 25,000 and 31,000 miles. assume the variable is normally distributed. give your answer rounded to four decimal places (to the nearest ten-thousandth).

Bella want to know what the students at her school think of her show. which is the best group to survey to find this information a. go to the mall and ask all of the students she recognizes from school b. ask her viewers to call in durning an episode of the show c. get a list of students at her school from the office and use a random number generator to pick 30 of them d. get a list of students at her school from the office and pick the first 30 students on the list