Farmer and has 250 m of fencing and wants to enclose a rectangular plot that borders on a river a farmer does not fence the side along the river find the length and width of the plot that will maximize the area what is the largest area that can be enclosed

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