Step-by-step explanation:
i used elimination method
Answer:
15,008 grams
You have 30,016 grams of radioactive kind of rubidium. How much will be left after 54 minutes if its half-life is 18 minutes? 15,008 grams.
5= 12+3/4x, identify x
-7=3/4x, isolate x
-7(4/3)=x, -28/3=x
:)
(x-11)^2 + (y-6)^2= 6^2
