Mary had four friends over to study for a test. Before her friends arrived, she baked four pies to share equally among herself and her four friends. Her dad ate a half of one of the pies when it came out of the oven. Mary still had to divide the remaining pies equally among herself and her friends. How much pie is each person going to get? ( Please explain how you got the answer)

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.

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?