How do you think the water ended up in the lake

Equilateral triangle pbj is inscribed in a circle as shown. determine the measure of arc pjb.

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?

What are some of the impacts of humans on the earth?