Abag contains 40 marble ,4 of which are blue , 10 are red ,25 are green , and 1 purple shawna takes a marble out of the bag, records the color and returns it to the bag . how many green marbles should she exepect after 400 trials

Elizabeth claims that the fourth root of 2 can be expressed as 2^m since (2^m)^n = 2. find the values of m and n for the case where elizabeth's claim is true.

Pls never taught i’m really confused and i rlly need

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