Alright
so equation is
P=initial amount
and t=time
r=rate
given
initial amount is 50
rate is 10%, but decreasing by 10% so -0.1
and time=6
A(6)=27.4406
about 27mg
so equation is
P=initial amount
and t=time
r=rate
given
initial amount is 50
rate is 10%, but decreasing by 10% so -0.1
and time=6
A(6)=27.4406
about 27mg