Question

Let t=50

y=30(2.7)^-0.004t
y=30(2.7)^-0.004(50)
y=30(2.7)^-.2

Need help with proper technique for using TI-83 to calculate.

Thanks

Answer 1

I don't have a TI , mine is an old SHARP.

But most work pretty well the same way.
On mine I would type:
30
x
2.7
y^x , or some key that resembles a power
.2
± , to make it negative
=

to get 24.59509486