An elevator travels 5 feet per second when it is going up and 6.5 feet per second when it is going down. An elevator starts at ground level and travels up for 7 seconds and down for 5 seconds. What is the
elevator's elevation after 12 seconds?
help pleasee

What is the length of the unknown leg in the right triangle ?

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?

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.