What is the equation of this circle in standard form?
M
(2,4)
N (9.4)
A (x - 5.5)2 + (y - 472 = 3.5
B. (X +5.5)2 + (y + 4)2 = 3.5
C (-5.5)2 + y - 4)2 = 12.25
D. (x + 5.5)2 + (y + 4)2 = 12.25

Need this asap if anyone can i would be very grateful. if you could show workings that would really

Which of these numbers of simulations of an event would be most likely to produce results that are closest to those predicted by probability theory? 15, 20, 5, 10

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