This situation below applies to the next four problems A bacterial colony is cultivated in a petri dish. Let z = f(x, y) refer to the population of the colony (in millions) after y days. x refers to...

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Extracted text: This situation below applies to the next four problems A bacterial colony is cultivated in a petri dish. Let z = f(x, y) refer to the population of the colony (in millions) after y days. x refers to the number of milligrams of a chemical that is added to the dish at the beginning of the cultivation. x\y || 10 | 20 | 30 | 40 | 50 18 | 30 75 221 30 42 67 | 100 | 38 | 45 58 | 66 81 68 | 71 76 | 80 100 15 200 24 300 400 66 500 70 70 71 73 75


Extracted text: What is the population of the bacteria after 20 days if 300 mg of the chemical is added? Enter your answer in millions. Complete the following. When 200 mg of chemical is added to the petri dish, the population of bacteria [Select ] increased by [ Select] million organisms between 30 and 50 days. decreased is increasing is decreasing O OR 42 OR 58 OR 100