What is the purpose of the confining layer in the florida aquifer?

Groundwater flow is generally towards the coast. In Florida, the aquifer contains two high- permeability zones separated by less permeable sands and clay's. The lower zone, which is under confined conditions, is referred to as the "main producing zone" because most of the groundwater use is withdrawn from this zone.

reflecting point a across the origin negates both of its coordinates.

b = (5, -4)

ń, wǒ shuō yīngyǔ, dàn wǒ huì shuō qítā yǔyán, rú xībānyá yǔ fǎyǔ yìdàlì yǔ hé pǔtōnghuà, suǒyǐ bùyào pànduàn, dànshì