If long run aggregate supply (LRAS) is vertical, the statements that must be true is: Aggregate demand does not affect the quantity of output.
<h3>What is aggregate supply?</h3>
Aggregate supply can be defined as the amount of goods or product a firm is expected to produce and sell or made available to buyers at a particular period of time.
Hence, assuming aggregate supply is vertical, aggregate demand which is the amount of goods buyers are willing to buy will not not affect the quantity of output or goods produced.
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The answer is NOT 21, it's 19.
9+10=19
Answer
learn a new language or just do something you rarely do
Explanation:
