What city identity on this map is located at approximately 39 degrees 50’N, 104 degrees 50’W?

According to the earth science reference tables, during which geologic time period were the continents of north america, south america, and africa closest together?

Determine which of the two measurements in each set is lesser.10°f or 20°ca. 10-fb. 20°c

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?