cho U={(1,2,8);(0,-1,-7);(2,3,9);(1,0,- 6)}.Tính số chiều và một cơ sở W của không gian con sinh ra bởi hệ vector U

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

9.4.34  question   to estimate the height of a stone  figure, an observer holds a small square up to her eyes and walks backward from the figure. she stops when the bottom of the figure aligns with the bottom edge of the  square, and when the top of the figure aligns with the top edge of the square. her eye level is 1.811.81 m from the ground. she is 3.703.70 m from the figure. what is the height of the figure to the nearest hundredth of a  meter?

John has 1/2 pound of oranges to share with julie. if they share the oranges equally, how much will each of them have?