4students were able to solve in different amounts of time

The vet charges $45 for an office visit and $10 for each vaccination your dog needs. write an eaquation

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square

Apyramid fits exactly inside a cube. the cube and the pyramid share the same square base, and they are both exactly the same height. the volume of the cube is 66 cubic inches. what is the volume of the pyramid? explain your answer. answer asap