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Snowcat [4.5K]
2 years ago
10

Please help will give lots of points and mark brainless

Mathematics
1 answer:
Liula [17]2 years ago
7 0

Answer:

4, his answer was way off... idk if this is right but I tried

Step-by-step explanation:

s= √21d

42=√21d

42/21=√d

2=√d

4=d

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