Question

this is a question i need answered please

Answer 1

Answer: .4 or .40 gallons

Step-by-step explanation:

If you follow along you get the right answer.

Answer 2

if you continue, You'll get:
$\frac{9 - 8 + 7 - 6 + 5 - 4 + 3 - 2 + 1}{10} = \frac{5}{10} = \frac{1}{2} = 0.5$
answer: 0.5