Answer :
The given arrangements reflect an arithmetic sequence, the value of the collection is $17.10
An arithmetic sequence is an ordered set of numbers that have a common difference between each consecutive term. The formula for the sum of an arithmetic sequence is:
Sn= d[n(n+1)/2]
where n = the number of terms to be added. a = the first term in the sequence. d = the constant value between terms.
As the collection comprises of dimes, the constant value d = 0.1. The number of terms to be added are the rows of array n = 18.
Hence,
Sn= 0.1[18(18+1)/2] = 17.10
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