A sample X1, X2, ..., X25 is randomly chosen from a population of N (20 comma space 36 )and another sample Y1, Y2, ..., Y36 is randomly chosen from a population of N (30 comma space sigma squared ).

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.

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

How do i put 3(x+7) in distributive property