I need help with the Daredevil Danny assignment... I just need help with steps 1 and 2. Please show work and everything I will give you brainliest

What is the missing constant term in the perfect square that starts with x^2 -20x

Item 1 solve for s. s+24=90 −114 −66 66 114

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.