Two different radioactive isotopes decay to 10% of their respective original amounts. a does this in 33 days while isotope b does this in 43 days. what is the approximate difference in the half lives of the isotopes? a.3 days b.10 days c.13 days d.33 days

the correct answer is 45x

9×5=45 then add the x

-362

step-by-step explanation:

(12)(4)+2(12)-34(12)+2(12)-3

  \/         \/         \/         \/

  48 +   24 -   408 + 24 - 3

      \   /               \   /

          72     -     432 - 3 = -363