Nadia's father bought a new camera, lens, and case. he rounded the cost of all the items to estimate how much he would need. he rounded the cost of the camera to $800,the cost of the lens to$500 and the cost of the case to $200. the actual cost of all theee items was $1489. what could the actual costs of the items be?

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