when you want to use an exponent, the ^ sign is most useful.
s=355000*(1.06)^(t) (problem 4)
s(deltat1)=35500*(1.06^((t+1))
s(deltat1)35500( 1.06^t * 1.06^1)
how much did it change?
ok, to help typing let
a=35500*1.06^t
percent change= [a(1+1.06^1)-a(1)]/a
= 1.06^1 which is not much, for percent multipy it by 100.
Now, 5.
any fraction taken to a positive power gets smaller, a decay.
a=.1(.5)^2000/5730
This is strictly calculator work.
Use your yx key, or if you want to use the ln key, then
lna= ln(.1)+ 2000/5730 * ln (.5)
then when you get ln a, a = e^lna