Solve.A collection of dimes is arranged in a triangular array with 14 coins in the base row, 13 in the next, 12 in the next, and so forth. Find the value of the collection.

A. $5.25
B. $10.50
C. $1.05
D. $21.00


Answer: B

Mathematics

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Solve.Looking ahead to retirement, you sign up for automatic savings in a fixed-income 401K plan that pays 6.5% per year compounded annually. You plan to invest $2,500 at the end of each year for the next 10 years. How much will your account have in it at the end of 10 years?

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Mathematics