The object shown in the figure is a cube (all edges are equal in length) . 
Suppose the length of diagonal CF in the figure is 
feet. What is the length of edge AC ?
Definitions:
Purchase Order
An official document issued by a buyer committing to pay the seller for the sale of specific products or services.
Fair-value Hedge
A hedge of the exposure to changes in the fair value of an asset or liability or an unidentified firm commitment that could affect profit or loss.
Drilling Machine
A tool used for making holes in various materials, part of machinery equipment.
Forward Contract
A financial agreement between two parties to buy or sell an asset at a predetermined future date and price.
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