Scientists track a flock of for three years to learn their
migratory patterns.
Is it a Observational Study or a Experiment and why?

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

Which inequalities can be used to find the solution set of the following inequality? check all that apply. |2x – 5| (2x – 5) (2x + 5) –(2x – 5) –(2x + 5)

Events a and b are independent. the probability of a occurring is 2/5. the probability of b occurring is 1/4. what is p(a and b)?