From which city was the lewis and clark expedition launched?

In the construction of new housing development, which factor of production can be categorized as land?

What does 2[tex] {2}^{ - 4} \times {2}^{ - 2} [/tex]

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?