Henry is filling his fish tank up with water at a constant rate five minutes after henry began filling the tank the water level was 17 cm
twelve minutes after henry began filling the tank, the water level was 38cm

what was the water level at 0 minutes when henry began to fill the tank?

4

Step-by-step explanation:

5:17 & 12:38

If he started at x gallons and after five minuites there was 17 cm of water and after 12 minuiyes the water level was 38, so in 17 minuites the water was at a level of 38 cm. If I explain this bit it'll be too confusing but I used logic to find out that x, how much water was in the bowl before they started pouring is 4