Multiple Choice
Solve the problem.
-A collection of dimes is arranged in a triangular array with 12 coins in the base row, 11 in the next, 10 in the next, and so forth with 1 dime in the last row. Find the value of the collection.
A) $3.90
B) $15.60
C) $0.78
D) $7.80
Correct Answer:
Verified
Correct Answer:
Verified
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