Picture on the left contains two dots, which can be dragged with a mouse. The size of variable x can be changed by dragging the green dot, and by dragging the black dot the size of the bigger square can be multiplied in relation to variable x. The picture can be used to help solve the assignments. If the side of the bigger square is 3x long, how big is its area?

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?