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?

all three statements are true

step-by-step explanation:

a shipping fee of 5% is charged online with every item purchased online

first let's just take each option and calculate them based on this, to see if the answers matched

keith buys a 40 dollar book

40 x 0.05 = 2

therefore there will be a two dollar fee on keith's book

40 + 2 =42

the first statement is true

a chair costs $80

80 x 0.05 = 4

80 + 4 = 84

the second statement is true

george buys a 20 dollar calculator

20 x 0.05 = 1

20 + 1 = 21

the third statements are true

all three statements are true

false

inverse variation is not exponential

well what is the rest of your problem?