There is a leak with a rate of 107.5 gallons every 43days, so:
[tex]rate_{\text{leak}}=\frac{107.5gallons}{43\text{days}}=\frac{107.5}{43}\frac{gallons}{\text{day}}=2.5\frac{gallons}{day}_{}[/tex]So, the reporter wants to make a table with the amount of contaminated water leaked for 1 week (7 days), 2 weeks (14 days) and 1 month (30 days).
[tex]\begin{gathered} \text{The amount of contaminated water at some time(t) in days:} \\ \text{water(t)}=\text{rate}_{\text{leak}}\cdot t \\ \text{water}(1\text{week)}=2.5\cdot7\text{ gallons}=17.5\text{ gallons} \\ \text{water}(2\text{week)}=2.5\cdot14\text{ gallons}=35\text{ gallons} \\ \text{water}(1month\text{)}=2.5\cdot30\text{ gallons}=75\text{ gallons} \end{gathered}[/tex]