**Now for some population stuff:**

**The world's population in 1950 was 2,555,982,611. In 1970, it was 3,706,601,448. Find the rate of growth.**

*** Remember our population equation:**

**Set it up:**

**What about predicting?**

**Can you predict what the world's population will be in 2050?**

Let's use the 1950 figure for our | : |

** And we can use the growth rate we just found:**

** 1950 to 2050 gives us t = 100...**

**Grab a calculator!**

**So, we predict that there will be 16,392,546,229 people on earth in 2050.**