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 5 days?
A) 52 milligrams
B) 55 milligrams
C) 50 milligrams
D) 49 milligrams
E) 59 milligrams
Correct Answer:
Verified
Correct Answer:
Verified
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