fast please!
Extracted text: The 1986 disaster in the former Soviet Union at the Chernobyl nuclear power plant explosion sent about 1000 kg of radioactive cesium - 137 into the atmosphere. The formula A = 1000( 0.5 JU30 models the amount ( A in kg ) of cesium - 137 remaining after t years in the area surrounding the Chernobyl. How many kilograms of cesium - 137 are still in the atmosphere after 80 years? Select one: O a. 176.86 kg O b. 164.25 kg O c. 157.49 kg O d. 198.43 kg