Help me answer this question thx

43lbs of tomatos cost $387. how much would 41lbs cost

1. find the area of the unshaded square 2. find the area of the large square 3. what is the area of the frame represented by the shaded region show

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