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Answer 1 · 2017-05-30T11:24:59

Volume of a sphere is #pi*r^3*4/3# but you have half of it.

Your igloo has a volume of

#V=pi*r^3*4/6# due to the fact that it is half of full sphere.

Your inner radius is #r=6-1.5=4.5# ft.

Now you can compute volume of your igloo:

#V=pi*4.5^3*4/6#

#V=191 ft^3#

This is your answer #191 ft^3#