QUESTION 15 The half-life of the first order radioactive decay of K is 1.30 x 10 9 years. How long would it take for the to decay to 25% of its original concentration? O a.3.25 × 108 yr M O b.5.4-109 yr O c. 2.60 × 109 yr O d. 1.30 * 109 yr O e. 9.75 × 108 yr

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QUESTION 15
The half-life of the first order radioactive decay of K is 1.30 x 10 9 years. How long would it take for the to decay to
25% of its original concentration?
O a. 3.25 * 108 yr
O b.5.4 x 109 yr
OG 2.60 * 109 yr
O d. 1.30 × 109 yr
O e. 9.75 × 108 yr
Transcribed Image Text:QUESTION 15 The half-life of the first order radioactive decay of K is 1.30 x 10 9 years. How long would it take for the to decay to 25% of its original concentration? O a. 3.25 * 108 yr O b.5.4 x 109 yr OG 2.60 * 109 yr O d. 1.30 × 109 yr O e. 9.75 × 108 yr
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