Need help, ASAP. The half-life of Palladium-100 is 4 days. After 12 days, a sample of Palladium-100 has been reduced to a mass of 1 mg. Find an equation of the form =*^ that can be used to model the Palladium-100.

geometry: triangles

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call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584

c

step-by-step explanation:

the answer is 13 cm