1. How long will it take an investment of $1000 to grow to $1400 if it earns 8% compounded continuously?
2. How long will it take an investment of $50,000 to grow to $80,000 if it earns 10% compounded quarterly?
3. Adam wants to buy a home entertainment system costing $5000. The price of the system increases 4% per year. How much will the system cost in 3 years?