Answer:
349.0 grams to nearest tenth
Step-by-step explanation:
After each minute there will be (100- 7.3) = 92.7 % ( or 0.927) of the element left.
Therefore after 8 minutes amount left = 640*0.927^8
= 349.0 grams answer
Answer: 349.0 gms.
Step-by-step explanation:
The exponential decay equation is given by :-
[tex]y=A(1-r)^t[/tex] , where A= Initial value , r = rate of decay in decimal and t is time.
As per given , we have
A= 640 gm
r= 7.3%=0.073
Then , our decay function will become :-
[tex]y=640(1-0.073)^t\\\\\Rightarrow\ y=640(0.927)^8[/tex]
At t= 8 minutes, we have
[tex]y=640(0.927)^8= 348.993908894\approx349.0[/tex]
Hence, after 8 minutes , the remaining amount of element = 349.0 gms.
