Answer:
the nonlinear system of equations have D. three solutions
The volume of the igloo is 523.43 m^3
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How to get the volume of the igloo?</h3>
We know that the volume of a sphere of radius R is:

Where pi = 3.14
Then the volume of a hemisphere is half of that.
In this case, we have a hemisphere with a radius of 6.3m, then the volume will be:

If you want to learn more about volume:
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Convert 1 and 1/2 to eights to make it easier to subtract. 1 4/8 add 1 to 4/8
12/8 then subtract that by 7/8 straight across the numerator. That then equals 5/8
The largest number is 345