Business Math

Shelley Katz deposited \$30,000 in a savings account at 5% interest compounded semiannually. At the beginning of year 4, Shelley deposits an additional \$80,000 at 5% interest compounded semiannually. At the end of 6 years, what is the balance in Shelley's account

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1. make a "time graph" to see where the payments go, and the time needed to reach the end of 6 years

amount = 30000(1.025)^12 + 80000(1.025)^6
= ....

( I got \$133122.14)

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2. try \$ 133,123.12

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