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...

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: amount of chemical increased decreased number of days 0.7 Complete the following interpretation of z (200, 50). population of bacteria rate of change of population is increasing is decreasing 1.85 100 50 days after the colony was established with 200 mg of the chemical, the ( Select ] is ( Select) v by approximately ( Select ] [ Select ] for every additional ( Select ] mg mg of the chemical days day millions of organisms millions of organisms