Which can be used to find the partial sum of the
first 12 terms?
50
1-1,0512
1 -1.05
50
(1 -1.05)2
1 - 1.05
50
1– 120.5
1-12

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