Example $8$: $($CC$5$e p$.10,$ Activity $25)$

Consider the function $t(n)=\frac{15}{1+2e^{-0\mathrm{.}5n}}.$ If an input value ${?}^8$ ven, find its corresponding output value. If an output value is given, find its corres$/$dino input value$($s$).$ Round answers to three decimal places.

a$.n=-2\mathrm{.}5$ input

b$.t(n)=7\mathrm{.}5$ output

c$.t(n)=1\mathrm{.}8$ outjut