King Dominion sells adult and child tickets. On Saturday, they sold 250 adult tickets and 400 child tickets, for a total of $22000 in ticket sales. On Sunday, they sold 300 adult tickets and 800 child tickets, for a total of $36000 in sales. How much do adult and child tickets each cost?

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