if 12 g of a radioactive substance are present initally and 8 yr layer only 6 g remain, how much of the substance will be present after 17 yr

Find the value of x that will make l ll m

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

What is the name of a polygon that has four congruent sides and theses angle measures 60,120,60,120?