We know that Box A has an average of 80 and an SD of 20. We also know that Box B has an average of 50 and an SD of 10. We will draw at random with replacement 100 times from Box A. Independently, we will draw at random with replacement 100 times from Box B. From Box A: the sum of the 100 draws expected value equals ; SE equals

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.

Sum of the interior angles of a pentagon

The angles in a triangle are represented by 5x, 8x, and 2x+9. what is the value of ? a.10.8 b.11.4 c.9.7 d.7.2