Question

An element with mass 510 grams decays by 26.3% per minute. How much of the element is remaining after 7 minutes, ?

Answer 1

Its the sames steps as the other answer but round the decimal instead of 60.23 do 60.2 because the ,23 is rounded to the nearest 10th i think thats how i got it right

Explanation:

Answer 2

Answer: The element is remaining after 7 minutes = 60.23 grams

Explanation:

The equation for mass decay :

`A=A_0(1-r)^t`, where
`A_0` = initial mass, A = mass after t minutes.

Given:
`A_0=510\ grams`

r = 26.3% = 0.263

t = 7 minutes

`A=510(1-0.263)^7\\\\=510(0.737)^7\\\\=510(0.118106123435)\approx60.23\ grams`

Hence, the element is remaining after 7 minutes = 60.23 grams