Someone plz help I'm begging

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?

The tile along the edge of a triangular community pool needs to be replaced? ?

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?