Respuesta :
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4500/900 = 5
Multiply 4 by this value:
4 x 5 = 20
He ran the machine for 20 hours.
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Answer:
Jake ran the machine for 20 hours.
Step-by-step explanation:
Divide 4500 by 900 and you get 5
then multiply 5 by 4 to find out how many hours he ran the machine