Mitchell has been placed in the 96th percentile in terms of his bmi. his doctor would likely tell his parents that he is:

Mitchell is likely to be overweight. BMI or Body Mass Index, it came up by Adolphe Quetelet, it is the measurement of the body fat of the person's weight over height. Overweight is a person considered to have existed fats that may cause health issues. 

population decrease means that the population of anything decreases by a large amount. For example there is 7 billion people on planet earth. Then it decreased by 3 billion.

Explanation: