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Mathematics, 29.05.2020 00:04 drdeb7766
The population of an endangered species of insect is 480,000. The population decreases at the rate of 10% per year. Identify the exponential decay function to model the situation. Then find the population of the species after 3 years.
A: y = 480,000(1.01)t; 280,000
B: y = 480,000(1.1)t; 638,880
C: y = 480,000(0.9)t; 339,940
D: y = 480,000(0.9)t; 349,920 5
Cesium-137 has a half-life of 30 years. Identify the amount of cesium-137 left from a 150 milligram sample after 120 years.
A: 0.9375 mg
B: 9.3750 mg
C: 1.097 mg
D: 1.325 mg 6
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