Endpoints of segment mn have coordinates (0, −3), (−2, −4). endpoints of segment ab have coordinates (2, 5), (4, k).

what value of k makes these segments perpendicular?

Both the red and blue line segments stretch from the center of the circle to a point on the circle. the length of the blue segment is 5. how long is the red line segment?

What is always true about a positive integer raised to a negative odd power?

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.