Question

2)A large gas tank is buried underground at Sheetz and the depth of gas in the tank changes over a four-dayperiod. The changes are as follows: down 153 gallons, up 374 gallons, down 86 gallons, and up 209gallons. What was the volume of gas in the tank at the beginning of the four-day period if the finalamount of gas in the tank was 42 gallons?

Answer 1

We have the following:

`\begin{gathered} V=42-153+374-86+209 \\ V=386 \end{gathered}`

Therefore, the answer is 386 gallons.