Need some help just want to check if my answer is correct

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?

Which two undefined geometric terms always describe figures with no beginning or end?

If the diagram polygon abcd is a reflection across ef to make polygon a'b'c'd'.