Math Problem Statement
An individual deposits Php 100,000 into an account that compounds annually at 12%. However, starting from the 2nd year, the individual withdraws Php 15,000 at the beginning of each year. After how many years will the account balance fall below Php 10,000? (Assume withdrawals are made before interest for the year is applied.)
Solution
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Math Problem Analysis
Mathematical Concepts
Compound Interest
Exponential Decay
Sequence and Series
Formulas
B_n = (B_{n-1} - Withdrawal) × (1 + Interest Rate)
B_1 = Initial Deposit
Theorems
Compound Interest Formula
Suitable Grade Level
Grades 11-12, College Level
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