Question: 1. Find the present and future values of an income stream of $3000 per year over a 15-year period, assuming a 6% annual interest rate compounded continuously.
2. A nuclear power plant produces strontium-90 at a rate of 3 kg/yr. How much of the strontium produced since 1971 (when the plant opened) was still around in 1992? (The half-life of strontium-90 is 28 years.)