S T
80°
R
Find the measure of ZRST.
A)
20
B)
30°
40°
D)
60°
Test on us test prep

Answer is in the file below

tinyurl.com/wpazsebu

answer: i ! the answer is   9000 seconds, also d

hope i

-lavira : )

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: