Ok so we are given a word problem discussing compound interest. In the first part of the question, we are given the equation: S(t) = (k/r)(e^rt -1) The next thing we are asked to do is calculate the value of r are given values of k, t, and S(t). The given values are k = 2000, t = 40, S(t) = 10^6. Plugging the values into this equation, you get: 10^6 = (2000/r)(e^40r - 1) So far I have divided both sides by 2000 so that the equation is now: 500 = (1/r)(e^40r -1) However now I can not figure out how to solve the equation for r with the two locations of the r's in the problem. Please help. Thanks.