On a test that has a normal distribution, a score of 45 falls two standard deviations above the mean, and a score of 27 falls one standard deviation below the mean. Determine the mean of this test.

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics

Louis wants to carpet the rectangular floor of his basement.the basement has an area of 864 square feet.the width of the basement is 2/3 it's length. what is the length of louis's basement

Use circumcenter theorem to solve for the given values