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

Which of the following describes how to translate the graph y = xi to obtain the graph of y = x - 11 - 12 1 unit left and 1 unit down 1 unit left and 1 unit up 1 unit right and 1 unit down 1 unit right and 1 unit up

What is the value of x in the this question ?

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.