Final answer:
The sentence 'Hay muchas personas en la casa' is correct. It means 'There are many people in the house.'
Step-by-step explanation:
The sentence 'Hay muchas personas en la casa' is correct.
'Hay' is the third person singular form of the verb 'haber' which means 'there is/are.' 'Muchas' means 'many' or 'a lot of.' 'Personas' means 'people' and 'en la casa' means 'in the house.'
Therefore, the sentence translates to 'There are many people in the house.'
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