ANSWER:
175.8 pounds
Explanation:
We have that Finn's weight is given by the following function:
![f(x)=193.9-1.1x](https://img.qammunity.org/2023/formulas/mathematics/college/gf0pbsms0qvql81sg4a2o3q2hnw1izjn9s.png)
Where x is the elapsed days, then to calculate its weight 16.5 days later, we must replace the value of x, just like this:
![\begin{gathered} f(16.5)=193.9-1.1\cdot16.5 \\ f(16.5)=175.75\cong175.8 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/khq76sc97v5aq98ejothskufpr8c8whni5.png)
Finn's weight after 16.5 days is 175.8 pounds