The life expectancy of a typical lightbulb is normally distributed with a mean of 2,000 hours and a standard deviation of 27 hours. what is the probability that a lightbulb will last between 1,975 and 2,050 hours? a. 0.17619 b. 0.32381 c. 0.79165 d. 0.96784

1. are the triangles similar and if so why? what is the value of x? show your work.

Arandom sample of 150 high school students were asked whether they have a job. the results are shown in the table. have a job do not have a job male 48 35 female 41 26 select a ord or phrase from the drop-down menus to correctly complete the statements describing the association.

The length of a rectangular piece of land is 92 yards more than three times its width. the perimeter is 760 yards. find its dimensions.