Question: Quesion 19 and 20 Question 19 (1 point) If a 50 9 sample of polonium-196 will contain 6.25 9 after 18 seconds. What is the

Quesion 19 and 20

Question 19 (1 point) If a 50 9 sample of polonium-196 will contain 6.25 9 after 18 seconds. What is the half-life of this element? Question 19 options: 0.11553 2.168 4.33s 63 Question 20 (1 point) A population of bacteria, growiwg exponentially, quadruples its number in four hours. How long does it take for the number of bacteria to be 1.5 times of the original number? Question 20 options: 1.5 hours 13.676 hours 1.169 9 hours 2.248 37 hours

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