Which statement is assumed to be true in euclidean geometry?

a.) three points on the same line lie on exactly one plane.
b.) a plane contains at least three points that do not lie on the same line.
c.) a plane contains at least two points that do not lie on the same line.
d.) three points on the same line never lie on the same plane.

Ineed i do not understand i'm only 8

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28

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.