How much of a radioactive kind of radium will be left after 8 days if the half-life is 4 days and you start with 268 grams?

use google you idiot omg you're so annoying

step-by-step explanation:

47 - 90 = 43

43 - 180 = x

x = 137

the answer is 21%.

6^2 or 36

step-by-step explanation:

6000n

6×1000n

6×10^3 n

so we need 6n need to be a perfect cube

so n has to be 6^2 so that 6n is 6^3

what i'm saying is if you let n be 6^2 you have 6^3×10^3 or 60^3 which is a perfect cube