Como se puede influir de manera tractiva en otros niños menores de 14 años para tomar medidas bioseguridad en tiempos de pandemia

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Suppose you want to use 600 meters of fencing to surround two identical adjacent rectangular   plots.  Write a function for the combined area of the plots with respect to the length of one of the   sides (x).  What dimensions would produce the maximum combined area?  What is that maximum   combined area?