This is hard i need help

Cassie is traveling 675 miles today to visit her brother and his family. so far, she has stopped for gas three times. at the first stop, she put in 7.1 gallons of gas and paid $23.79. at her second stop, she put in 5.8 gallons of gas and paid $19.08. and, at the third stop, 6.6 gallons and paid $20.39. at which stop did casey pay the most for gas?

How do businesses a country's economy? a. by investing in goods and services b. by increasing the unemployment rate c. by making profits

How many grams the dog will eat in 3 days?