Given:
[tex]f(t)=300(1-t)^5[/tex]The exponential growth formula is,
[tex]\begin{gathered} y=a(1+r)^x \\ r=\text{ grwoth rate} \\ a=\text{ initial value} \\ x=\text{ time} \end{gathered}[/tex]The exponential decay formula is,
[tex]\begin{gathered} y=a(1-r)^x \\ r=\text{ decay rate} \\ a=\text{ initial value} \\ x=\text{ time} \end{gathered}[/tex]So, the given equation is exponential decay.
The starting value of the function is 300