I will mark brainliest .. help me

What is a graph with a never ending line called?

In the triangles, bc =de and ac fe.if the mzc is greater than the mze, then ab isdfelth

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.