Arc LM on circle O has a measure of 40°.Circle O is shown. Line segments L O and M O are radii. Sector L O M is shaded. Which statements are true? Check all that apply.

Ascientist is explaining how background cosmic radiation gives evidence of the big bang theory. she says that radiation has been detected everywhere equally as heat in the universe and is increasing. this has been shown to be residual radiation from the big bang. what error did the scientist make?