Two twin sisters are away at college. They both called home today. Tara calls home every 4 days. Sara calls home every 3 days. How many days will it be until Tara and Sara both call home on the same day again? (answer only write that number)

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex