1. Find the accumlated present value of a continuous stream of income at rate R(t)=$235,000, for time T=18 years and interest rate k=7%, compounded continuously. The present value is?

2. In 15 years, James is to receive $300,000 under the terms of a trust established by his grandparents. Assuming an interest rate of 5.3% compounded continuously, what is the present value of Anthony's legacy?

3.R(x)= 0.005x^3+0.01x^2 +0.5x, currently sells 70 lawn chairs daily. Use marginal revenue to estimate the increase in revenue is 73 lawn chairs were sold each day