element x is a radioactive isotope such that every four years, its mass decreases by half. given that the initial mass of a sample of element X is 300 grams, how long would it be until the mass of the sample reached 90 grams

Find the complete factored form of the polynomial 40m^3n^2+45m^2n^6

Which statement accurately describes how to perform a 90° clockwise rotation of point a (1,4) around the origin?

Asample of 200 rom computer chips was selected on each of 30 consecutive days, and the number of nonconforming chips on each day was as follows: the data has been given so that it can be copied into r as a vector. non. conforming = c(10, 15, 21, 19, 34, 16, 5, 24, 8, 21, 32, 14, 14, 19, 18, 20, 12, 23, 10, 19, 20, 18, 13, 26, 33, 14, 12, 21, 12, 27) #construct a p chart by using the following code. you will need to enter your values for pbar, lcl and ucl. pbar = lcl = ucl = plot(non. conforming/200, ylim = c(0,.5)) abline(h = pbar, lty = 2) abline(h = lcl, lty = 3) abline(h = ucl, lty = 3)