What is the cost of a ruby that weighs 5.76 carats with a per-carat price of $5,500.00?

To determine the cost of a ruby based on its weight and the price per carat, you multiply the weight of the stone (in carats) by the price per carat. In this case, the ruby weighs 5.76 carats, and the price per carat is $5,500.

Performing the calculation:

5.76 carats × $5,500 per carat = $31,680.

The answer is typically rounded to the nearest whole number, which leads to approximately $31,600. This calculation takes into account both the weight of the ruby and the established market price per carat, thus reflecting the correct valuation of the gemstone based on standard pricing practices.