Please do the 3 questions, trolls and unneeded answers will be reported, thanks in advanced (show work if needed for the question)

The jones farm has 24 cows that each produce 52 quarts of milk a day. how many quarts are produced each day altogether

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels.ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0