A Landowner Is Looking to Develop a Coal Mine on Their

question 5

Multiple Choice

A landowner is looking to develop a coal mine on their property. She determines that a surface mine is the best option, as the coal seam she is targeting is close to the surface. The cost to start the mine is $20 million and the annual cost to operate is $16 million. She estimates that they can remove 450,000 tons of coal a year and sell the coal for $38.50 per ton. How long will it take before she is able to pay off her investment and start to make a profit?

• A)15 months
• B)15 years
• C)1.15 years
• D)115 months

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Definitions:

Retina

The light-sensitive inner surface of the eye, containing the receptor rods and cones plus layers of neurons that begin the processing of visual information.

Thalamus

A part of the brain located above the brainstem that acts as a relay center, directing sensory and motor signals to other parts of the brain.

Hippocampus

A region of the brain that is associated with memory formation, navigation, and the consolidation of information from short-term to long-term memory.

Lens

A transparent structure in the eye that helps to refract light to be focused on the retina for clear vision.