On the Integrated Reasoning section, you have access to a calculator.
So just solve the formula for radius of the sphere first.
If you know circumference as 5.50 meters, then pi * d = 5.50
d = 5.50 / 3.14
d = 1.75
Since radius is half the diameter, radius is 0.876.
Now we have to solve for surface area then multiply by cost / square meter.
Surface area is 4pi*r^2
4 * 3.14 * 0.876 * 0.876 = 9.636
$92 / square meter
OK so $92 / sq meter * 9.636 square meters = $886.5
After some rounding that is $900 so that is the best answer for the first column.
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