an airplane travels 3845 kilometers against the wind in 5 hours and 4345 kilometers with the wind in the same amount of time. what is the rate of the plane in still air and what is the rate of the wind?​

If you are dealt 4 cards from a shuffled deck of 52? cards, find the probability that all 4 cards are diamondsdiamonds.

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

In a timed typing test lara typed 63 words per minute. estimate the number of words she should be able to type in half in hour show your work