# Algebra

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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

• Algebra -

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
yx , or some key that resembles a power
.2
± , to make it negative
=

to get 24.59509486

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