Lesson 9 - 3.2 # 18 - Find formula given a graph of an exponential with points . Using And for a: Formula is

Lesson 9 - 3.2 # 31 - Given the graph of an exponential increasing function of P = f(t) that shows the balance of an account with the points . (a) Formula is (b) Initial value is (c) rate is r = 0.20112 or 20.112%

Lesson 9 - 3.2 # 39 - Comparing two exponential populations: (a) Find P0 for human population given (40, 13,000,000) and rate of 8% growth per year: Solve for P0 in P0 = 598,402.133 or about 598,403 (b) Find black bear population when t = 40 if P0 = 11,000 and decline by 6% per year. So find . (c) Black bear population will be 100 when? Solve for t in . Ans t = 76 years or 1953 + 76 => the year 2029 See graphic solution

Graphic solution y = 100 and y = 11000(0.94)x