8. in 1986, an accident at the chernobyl nuclear power reactor led to widespread
contamination of cesium-137, a highly radioactive, man-made isotope of cesium. it has a
half-life of 30.17 years, which means it decays at a rate of 2.3% per year. it is estimated
that nearly 191,500 kbq/m² was leaked during the disaster. how much of the material is
still radioactive now, 25 years later?

Which description is represented by a discrete graph? kiley bought a platter for $19 and several matching bowls that were $8 each. what is the total cost before tax? the temperature at 9 a.m. was 83° f and is heating up at an average rate of 6°f per hour. what is the temperature x hours later? juan ate an egg with 78 calories and some cereal with 110 calories per serving for breakfast. what is the total amount of calories he consumed? a bottle contained 2,000 ml of liquid and is being poured out at an average rate of 300 ml per second. how much liquid is left in the bottle after x seconds?