1. Find the amount of a continuous money flow in which $150 per year is being invested at 6.5%, compounded continuously for 10 years.

2. In 1990 (t = 0), the world use of natural gas was 71575 billion cubic feet, and the demand for natural gas was growing exponentially at the rate of 7% per year. If the demand continues to grow at this rate, how many cubic feet of natural gas will the world use from 1990 to 2019?

3. Find the accumulated present value of an investment over a 19-year period if there is a continuous money flow of $2600 per year and the current interest rate is 9%, compounded continuously. 4. If, when evaluating an improper integral, the limit exists, then we say that the integral_____________ If the limit does not exist, then the integral________________