The Radioactive Bismuth Isotope ²¹⁰ Bi Has a Half-Life

question 15

Multiple Choice

The radioactive bismuth isotope ²¹⁰ Bi has a half-life of 5 days. If there is 100 milligrams of ²¹⁰ Bi present at t = 0, then the amount f(t) remaining after t days is given by: How much ²¹⁰ Bi remains after 25 days?

• A)3.125 milligrams
• B)12.125 milligrams
• C)5.125 milligrams
• D)8.125 milligrams
• E)2.125 milligrams

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