Which numbers represents a repeating decimal -2/5, -7, 3/9, 11/12

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Acircle has a circumference of 28.36 units what is the diameter of the circle

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