You have 4 Tums Antacid tablets that you place in separate cups. The first tablet remains whole. The second tablet is broken into four large pieces. The third tablet is broken into many small pieces. The fourth tablet is crushed into powder. You know that vinegar reacts to antacid tablets, so you add 5 mL of vinegar to each of the four cups and time how long it takes for the tablet to completely disappear. The data table describes the results you recorded. What is this experiment modeling?