In the lunchroom there were 100 milk cartons at lunch. when lunch was over 80 cartons of milk had been purchased. what is the the ratio of the number of milk cartons purchased to the total number of milk cartons?

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

Let x = a + bi and y = c + di and z = f + gi. which statements are true?

Can someone plz me understand how to do these. plz, show work.in exercises 1-4, rewrite the expression in rational exponent form.[tex]\sqrt[4]{625} \sqrt[3]{512} (\sqrt[5]{4} )³ (\sqrt[4]{15} )^{7}\\ (\sqrt[3]{27} )^{2}[/tex]