Uranium-238 ( 
) decays to form thorium-234 ( 
) with a half-life of 4.5 * 109 years. How many years will it take for 75% of the uranium-238 to decay?
A) 9.0 * 1010 years
B) 4.5 *109 years
C) 4.5*1010 years
D) 9.0 * 109 years
E) 3.8 *109 years
Correct Answer:
Verified
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