Question

The half-life of uranium-238 is 4.5 x 10*9 years. the half-life uranium-238 is 2.5 x 10*5 years. How many times greater is the half-life uranium-238 than that of uranium-234?

Answer 1

Explanation:

Note: If the 9 and 5 are exponents, they should be indicated with a ^, not *.

(4.5*10^9)/(2.5*10^5) = (4.5/2.5)*10^(9-5) = 1.8*10^4 = 18000

The half-life of uranium 238 is 18000 times the half-life of uranium 234.