A study has a quota of 200. if you can expect 80% of you sample to recovery in 6 days, how many pieces of sample will need to be added to the study in order to reach quota in 6 days.

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

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.

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.