Question

If a substance decays by 75% every 600

years, how long will it take, in years, for 256
grams of the substance to decay to 1 gram?​

Answer 1

The substance of 256 gm will be decayed into 1 gm in 800 years.

Explanation:

Given,

The substance decays 75% in every 600 years.

Amount of substance = 256 gm

To find the the time the substance to decay to 1 gm.

Now,

75% decay in 600 years

1% decays in 600÷75 years

100% decays in
`(600)/(75)`×100 years

= 800 years

Hence,

The substance of 256 gm will be decayed into 1 gm in 800 years.