Which provides evidence to support the big bang theory?
a.
the magnetization of rocks on the ocean floor
b.
the composition of the sun
c.
the red-shift of distant galaxies
d.
the change in carbon dioxide levels in the atmosphere

Which of the following is not a challenge to instituting sound global environmental policies? a. most changes are inexpensive and easy to implement. b. elected leaders who support unpopular environmental issues often are not re-elected. c. economic considerations outweigh environmental ones in many societies. d. there is no way to enforce international environmental agreements.

If the basis of an isosceles trapezoid have lengths of 11 and 26, what is the length of the median?

In a class of 20 students, what democratic form of governance makes the most sense