An item is priced at $13.46. If the sales tax is 6%, what does the item cost including sales tax?
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The cross-section of a sphere is a circle . The area of a circle can be calculated by the formula A= Where r is the radius of the circle.
Given :
Solving for r we have:
Or r= 10.
The area of a sphere is calculated by the formula :
Substituting r value we have:
SA=
The total surface area of this sphere is 400π .