Elizabeth brought a box of donuts to share. there are two-dozen (24) donuts in the box, all identical in size, shape, and color. six are jelly-filled, 7 are lemon-filled, and 11 are custard-filled. you randomly select one donut, eat it, and select another donut. find the probability of selecting two lemon-filled donuts in a row.

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.

Tan198=asin164=? how to solve this? ?

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x