Between 1650 and 1880, brazil’s economy was based on

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

What would have happened to portugal’s trade if they had not found a way to sail around the tip of africa

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?