1.The present worth of an increasing geometric gradient is $23,632. The interest rate is 10% per year, and the rate of change is 4% per year. If the cash flow amount in year 1 is $3000, compute the year in which the gradient ends?
2.A civil engineer deposits $10,000 per year into a retirement account that achieves a rate of return of 15% per year. The amount of money in the account at the end of 25 years is closest to
3.Exotic Faucets and Sinks, Ltd., guarantees that its new infrared sensor faucet will save any household that has two or more children at least $30 per month in water costs beginning 1 month after the faucet is installed. If the faucet is under full warranty for 5 years, the minimum amount a family could afford to spend now on such a faucet at an interest rate of 10% per year, compounded monthly, is closest to