A triangle and a square are shown. The areas of the two shapes are identical. Find the side length of the square.
8 cm
9 cm
Not drawn to scale

d

step-by-step explanation:

n word

step-by-step explanation:

what lives in the hood

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: