Answer:
9.14
Explanation:
The family vehicle can go 300 miles on a tank of gas worth $40.
1. Find the cost of the gas in two options for Day 1.
First option:
300 miles - $40
304 miles - $x
Write a proportion:

Second option:
300 miles - $40
260 miles - $y
Write a proportion:

2. Calculate the total price:
First option:
Gas cost = $40.53
National park = $25
Lakes - free
Total cost = $65.53
Second option:
Gas cost = $34.67
Water park for 4 persons

Amusement park for 4 persons

Total cost =$74.67
Difference = $74.67 - $65.53 = $9.14