How much of a radioactive kind of francium will be left after 44 minutes if you start with 2,616 grams and the half-life is 22 m
2 answers:
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⇛-7.5(x−3) = 3.75
⇛-7.5x + 22.5 = 3.75
⇛-7.5x = 3.75 - 22.5
⇛-7.5x = -18.75
⇛x = -18.75 ÷ -7.5
⇛x = -18.75/-7.5
⇛x = 2.5