Worth 25 ! lucy cuts 4 squares with side length x in. from the corners of a 12 in. by 18 in. cardboard rectangle. she folds the remaining cardboard to make a tray that is x in. high. write and simplify a polynomial function for the volume v of the tray in terms of x.

What is the value of x when x + 7 = 21?

Kira looked through online census information to determine the overage number of people living in the homes in her city what is true about kira's data collection?

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.