BoatWorks built $3$ canoes in January of this year and then each subsequent calendar month they built twice the number of canoes they had built the previous month. How many total canoes were built by BoatWorks by the end of March of this year?

Respuesta :

January: 3 canoes

February: 3(2)=6 canoes

March: 6(2)=12 canoes

3+6+12=21 canoes

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