This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.
ScanSolve AI Answer
Thanks for providing the specific data points, Tshiamo! Let's recalculate using these figures. A) one billion to two billion Step 1: Identify the years from your data. Population reached one billion in 1830. Population reached two billion in 1939. Step 2: Calculate the difference in years. 1939 - 1830 = 109 years B) two billion to four billion Step 1: Identify the years from your data. Population reached two billion in 1939. Population reached four billion in 1975. Step 2: Calculate the difference in years. 1975 - 1939 = 36 years Last free one today — make it count tomorrow, or type /upgrade for unlimited.