Which is longer 4000 ft or 1 kilometer?

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables

An expression for the average of x 2x and 3y

Which statement is correct? the range of the graph is all real numbers greater than or equal to 0. the domain of the graph is all real numbers greater than or equal to 0. the range and domain of the graph are the same. the domain of the graph is all real numbers