Question: Pls do question 3 and 4. It's about ordinary diffenrential equation. the substance remain? 3. If 100 grams of a radioactive substance is present 1

Pls do question 3 and 4. It's about ordinary diffenrential equation.

the substance remain? 3. If 100 grams of a radioactive substance is present 1 year after the sul solutions to f stance was produced and 75 grams is present 2 years after the substance various kinds was produced, how much was produced and what is the half-life of the we reiterate substance? which includ 4. In 1977 the rate of carbon 14 radioactivity of a piece of charcoal found generating a at Stonehenge in southern England was 4.16 disintegrations per minute per gram. Given that the rate of carbon 14 radioactivity of a living tree DEFINIT is 6.68 disintegrations per minute per gram and assuming the tree which was burned to produce the charcoal was cut during the construction of Stonehenge, estimate the date of the construction of Stonehenge. The first tion (DE) (1 ) subject to (2) It is custo (3)

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