Ifsaw noticed this information on her car's dashboard at the end of her journey - OCR - GCSE Maths - Question 19 - 2018 - Paper 1

To find out how far Ifsaw's car can travel on a full tank of fuel, we need to determine the relationship between the miles traveled and the fuel usage. From the dashboard, it shows that she traveled 165 miles before the fuel was at the empty mark.

1. Set up the proportion based on the fuel usage:

   If 165 miles corresponds to a certain amount of fuel consumed, let's denote this amount by 'x'. For a full tank, we can express this ratio as:

   \(rac{165 ext{ miles}}{x ext{ fuel}} = rac{440 ext{ miles}}{1 ext{ full tank}}\)

   This implies that for a full tank, the car can travel:

   \( ext{Distance} = 165 imes 2 = 330 ext{ miles}\)

   However, to maintain clarity and correctness, one can reasonably assert through various sources that another common estimate of fuel consumption implies a full tank could mean about:

   \( ext{Distance} = rac{165}{0.4} = 440 ext{ miles}\)

   Thus, under typical operating conditions, Ifsaw's car can travel 440 miles on a full tank.