Find the volume.
Each cube = | cu cm
2 cm
3 cm
6 cm
Volume
cm3

570, the answer is 570, hope it

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:  

114 plus 113 times 2 and 114 times 3

x:       y:  

-1         4

0         4

1         6

2         18

3         20