Final answer:
To model the investment increase by 20% annually starting at $500,000, the formula A = 500,000(1 + 0.20)^t is used, where A is the amount after t years, P is the initial investment, r is the annual growth rate, and t is the number of years.
Step-by-step explanation:
To model the investment of a company that increases by 20% every year from an initial amount of $500,000, we use the formula for compound interest. The general form of the equation for compound growth is A = P(1 + r)^t, where:
- A is the amount of money accumulated after n years, including interest.
- P is the principal amount (the initial amount of money before interest).
- r is the annual interest rate (decimal).
- t is the time the money is invested in years.
For this particular scenario, P is $500,000, r is 20% or 0.20, and t represents the number of years. Plugging these into the formula, the explicit equation that models the company's investment over time is:
A = 500,000(1 + 0.20)^t