1. Potassium40hasalifeof11930millionyears. Howlongwillitbeuntilonly1.4%remains (2decimals) yt = yoekt

2. (a)Howmanynumbersof5differentdigits eachcanbeformedfromthedigits0,1,2, 3,4,5,6? (b)Howmanyofthesenumbersare even? 3. (c)Howmanyofthesenumbersare divisableby5? 4. Simplify 5. (n+3)!=(n1)!319! =317! 6. Permutationsanarrangementofobjectsinadefiniteordertopermuteasetofobjectsmeansto rearrangethem. 7. UsingthelettersC,A,Thowmany permutationscanyouget?Makeachart 8. UsingthelettersC,A,Thowmany permutationscanyouget?UsePickFormula n! nPr or P(n,r) =(nr)! 9. Permutations336 10. YiNanhasthefollowinglettertilesA,W,L,N,S,OandD Howmanypermutationsof4letterscanYiNan create? n! (nr)! 11. A120roomhotelhasreservationsfrom6guestsfor6 differentrooms.Inhowmanywayscantheroomsbe assigned? 12. Exercise30 112Questionsfromex28youdidn'tdo 13. Attachments Project365290byflickruserMikeNeilson notebook.galleryitem