Question 14 of 42 What is the area of the obtuse triangle below?

A. 90 sq. units
B. 45 sq. units
C. 15 sq. units
D. 21 sq. units

All of the following statements about the biosphere are true except: a. light and heat from the sun do not affect the biosphere. b. the biosphere gets resources from earth's crust, hydrosphere and atmosphere. c. like "biology", the name for the biosphere comes from the greek word for life. d. the biosphere includes all living organisms on earth's surface.

Name two factors that, "power of magnetic field " of earth.

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