There are 4 milligrams of a radioactive substance in a lab in month 1 each month half of the radioactive substance loses its radioactivity. which graph matches the situation?

Simplify the expression 10/11(22z) + (a+5) -1

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76

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