Respuesta :

Answer:

~ 30 centimeters of the fish in the poster ~

Step-by-step explanation:

Let us plan out our steps, and solve for each:

1. Given the information, let us create a proportionality as such:

      3            =            1      ⇒   x - centimeters of the fish in the poster

      x                         10

2. Now let us cross multiply, and solve through simple algebra for x:

3 * 10 = x,

x = 30 centimeters of the fish in the poster

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