In 1986, one of the largest nuclear power plants in the Ukraine suffered a horrible explosion that sent radioactive iodine and cesium into the air. A large amount of radiation escaped into the atmosphere, and much is still contained in the soil. The half-life of cesium-137 is about 30.2 years. If a soil sample was found to contain 18.4 mg of cesium-137 in 2005, how much was released into the soil at the time of the accident? How much is cesium-137 will be left in 2030?

Saline iv fluid bags cost $64.20 for 24, 1000 ml bags from one supplier. another supplier sells 500 ml bags for $2 each. the hospital uses about 10,000, 1000 ml bags each month. nurses report that about half of the bags are more than half full when they are discarded. if you are going to use only one supplier, which would you choose and how much would you save with that choice? show calculator try it! if you buy 1000 ml bags, how many do you need to buy each month? type your answer in the space provided and click on the check answer button.

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

What is the value of the expression 9+n/3-6 when n = 12? 1. 5. 7. 12.