Iam doing a math question that has a z at bottom and a number 2 at the top of it

Which choice represents the sample space ,s for this event

The height of a flare fired from the deck of a ship in distress can be modeled by h(t)= -2(8t^2-52t-28), where h is the height of the flare above water and t is the time in seconds. a. find the time it takes the flare to hit the water.

Indicate the formula for the following conditions: p^c(n, r)=