Carin has 54 rock songs, 92 dance songs and 13 classical songs on her playlist. If Carin’s music player randomly selects a song from the playlist, what is the experimental probability that the song will not be a dance song P(not a dance song)?

the radius is 2 times the diameter.

step-by-step explanation:

ending amount = beginning amount / (2^n)

where "n" = number of half-lives (or elapsed time / half-life)

ending amount = 50 mg / (2 ^10 / 5.3)

ending amount = 50 mg / (2 ^ 1.8867924528)

ending amount = 50 m / 3.6981210597

ending amount = 13.5203794557 mg

or about 13.5 mg remain

source:  

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