Krypton-85 has a half-life of 10.76 years. It decays into rubidium-85. Suppose a sample contains 4 atoms of krypton-85 and 12 atoms of rubidium-85.
About how old is the sample?

lihuliivi hili nilu lutaula previous 21 next end of semester test: english 12b submit test reader tools info- select the correct answer from each drop-down menu. read this excerpt and complete the sentences that follow a shropshire lad by ae housman (excerpt) when i was one-and-twenty i heard a wise man say "give crowns and pounds and guineas but not your heart away give pearls away and rubies but keep your fancy free." but i was one-and-twenty no use to talk to me when i was one-and-twenty i heard him say again, "the heart out of the bosom was never given in vain 'tis paid with sighs a plenty and sold for endless rue" and i am two-and-twenty. and oh, 'tis true, 'tis true the central theme of the poem is in the end, the poet the wise man's views. reset next