Drag each expression to the correct location on the table.
determine which expressions represent real numbers and which expressions represent complex numbers.
real numbers
complex numbers
-1+32
-2 + 5+
0 + 4+
409
v-30
72 + 6
=3
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"if it is my birthday, then it is snowing"

both equations and proportions are better.

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: