Question: The following table lists the distance in miles from lightning d n when thunder is heard n seconds after lightning is seen. Is this sequence

The following table lists the distance in miles from lightning d_n when thunder is heard n seconds after lightning is seen. Is this sequence arithmetic? What is the common difference? n (in seconds) 5 6 7 8 9 10 dn (in miles)

n (in seconds) 5 6 7 8 9 10 dn (in miles) 1 1.2 1.4 1.6 1.8 2

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