Vanessa, Samantha, Hannah and Jordyn are all part of a 12 member volleyball team. four members of the team are randomly selected to fill the water jug for the day, what is the probability that all for of them will be chosen?

Apatient is given 50 mg dose of medicine the medicines effectiveness decreases every hour at a constant rate of 40% what is the exponential decay function that models this scenario how much medicine will be left in the patients system after 2 hours

Can someone me out here number 4 plz

Is it greater than or less than7*3_9*2