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When two goods are perfect substitutes,the indifference curves are right angles.
Copper
A red-orange metal that is a ductile, malleable element with very high thermal and electrical conductivity.
Cobalt
Cobalt is a chemical element with symbol Co and atomic number 27, known for its use in alloys and magnets.
Sulfur
A yellow, nonmetallic element that exhibits a characteristic smell and plays a vital role in the chemical industry.
Antimony
A brittle, lustrous gray metalloid used in alloys, flame retardants, and electronics, represented by the symbol Sb and atomic number 51.
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