Question: Question 15 (Mandatory) (1 point) A certain radioactive isotope has a half life of 5 years. If a sample has 120 grams of radioactive material,

Question 15 (Mandatory) (1 point) A certain radioactive isotope has a half life of 5 years. If a sample has 120 grams of radioactive material, what equation could be used to determine the amount of material remaining (y) after x years. Oay = 6057 by = 120(;) Ody - 4 (120) Ody = 120(5) 17 Question 16 (1 point) In 1999, a sum of $600 is invested at a rate of 2.9% per year for 8 years. What is the value of the investment when it matures? $3000 $739.20 $1258.40 $754.18

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