Question

4. Chrissy had 4 gallons of gas in her tank when she arrived at the gas

station. She pumped gas into her car at a rate of 3/10 gallon per
second. How many gallons of gas were in the tank after s seconds?

Answer 1

• 4 + 0.3s

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Initial volume of gas was 4 gallons.

The volume of gas pumped into tank after s seconds was:

• (3/10)s = 0.3s

The total volume of gas become:

• 4 + 0.3s