Respuesta :

All things being equal; demand decreases, as price increases.

The quantity supplied when price is $4 is 28

From table 4.4 (see attachment).

When price = $4, we have the following supplies:

  • Firm A = 6
  • Firm B = 6
  • Firm C = 8
  • Firm D = 10

So, the total supply at $4 is:

[tex]Total = 4 + 6 + 8 + 10[/tex]

[tex]Total = 28[/tex]

Hence, the quantity supplied when price is $4 is 28

Read more about demand and supply at:

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