Find the center and radius of the circle x2 - 22x + y2 + 20y =4
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For this case we have that by definition the mass is given by:
Where,
- <em>D: density </em>
- <em>V: Volume </em>
The volume of a pyramid is given by:
Where,
- <em>A: area of the base </em>
- <em>h: height </em>
Substituting values we have:
We now calculate the mass:
Answer:
he needs 7.74 pounds of zinc