Which numbers are irrational?
-4
5/19
0.573
7/3
Pie
Square root of 11

-4 and 0.573

Step-by-step explanation:

you bought 31 v bucks

step-by-step explanation:

25+6=31

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: