If P = 60°, then Q = 30 60 120

Which inequality has a dashed boundary line when graphed ?

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

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.