**Problem 2**

Assume a watermelon weighs 100 lbs and contains 99% water. It is left out in the hot sun so that some water evaporates until the watermelon contains only 98% water. What is the weight of the watermelon then?

[Problem
submitted by Juergen Pahl, LACC Professor of Mathematics,]

**Solution for Problem 2:**

Let _{} be the amount of water
lost due to evaporation. Then the amount
of water left in the watermelon is

_{}

50 lb of water had
evaporated, and therefore the weight of the watermelon had dropped to 50 lb.