Answer:
read explaination
Step-by-step explanation:
so for every minute, he adds 4 cards. because he finishes the pyramind in 21 minutes, we multiply the minutes taken with the amount of cards used per minute. so its 21 x 4=84. hope this helped
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Answer:
read explaination
Step-by-step explanation:
so for every minute, he adds 4 cards. because he finishes the pyramind in 21 minutes, we multiply the minutes taken with the amount of cards used per minute. so its 21 x 4=84. hope this helped