Respuesta :

Answer:

21

Step-by-step explanation:

3x3x3=27

27-6=21

Answer:

Over the next decade the Ogallala aquifer will be completely depleted and will affect portions of the central and southern High Plains Aquifer (HPA). The Ogallala Aquifer is one of the largest bodies of water in the United States and is is generally used by farmers for irrigation of crops. As the continuous depletion of the aquifer occurs, it may become problematic for agricultural industries to sustain their farming.

Step-by-step explanation:

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