Question

Koban 222 (a fictitious substance) decays by about 4.5% every day. How much of a 74 pound sample remains after:
7days:
1 week:
24days:

Answer 1

decays at \(4.5\%\) daily means every day we can multiply by \(.955\) sine 100%-4.5% is 95.5%

Answer 2

so after 7 days we get
\[.955^7\] whatever that is

Answer 3

if you start with 74 pounds it will be
\[74\times(.955)^7\] for 7 days
also for one week

Answer 4

what is the answer? to 24 days?

Answer 5

i got 65.6124 but theyre telling me its wrong