yan has already finished 3/5 of the 45 math problems he was assigned today. each math problem took him 1 4/5 of a minute to complete. if this pace continues, how much more time, to the nearest minute, will the rest of the problem take him to finish?

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