Someone please explain the difference of Multiples and Factors as well as an example.

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan

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 expression is equivalent to7_/x^2 ÷ 5_/y^3? assume y# 0