Watch "How Wolves Changed Rivers" on YouTebe ***And answer the following question please ASAP ASAP please

1. Why did the "deer" (they are really elk) leave the valleys when the wolves were re-introduced to Yellowstone?

2. When the elk left the valleys, what happened to the vegetation? Give specific examples.

3. Once the vegetation changed, what wildlife came back?

4. How did the wolves change the rivers?

5. How did the elk change the rivers when the wolves were removed from Yellowstone National Park?

Benito is selecting samples of five values from the table, which row will result in the greatest mean? population data row 1 4 2 2 3 3 row 2 3 3 4 3 2 row 3 2 4 3 4 3 row 4 3 4 4 7 3 row 1 row 2 r

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297