First we need to consider the amount of bacteria that grew after two hours. Since 100 bacteria grew after 2 hours, we need to find how much bacteria grows per hour.
We can find that by dividing 100 by 2
100/2 = 50 Bacteria per hour
Now that we know how much bacteria grows per hour, we can then multiply that amount to the amount of hours asked in the problem.
The correct answer is choice A. Qualitative data is data that is collected based on a quality or a characteristic. These type of data will not involve numbers or measurements, but descriptive words.