Zach walks dogs for $20 per month per dog. he also has a part-time job that pays $9.70 per hour. zach’s car payment and insurance is $381.44 per month. if zach has 3 dog walking clients in one month, how many whole hours does he need to work to pay his car payment and insurance? write and solve in inequality to find the answer. answer asap

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