Answer:
64 for number 1. Not sure on number 2 sorry.
Step-by-step explanation:
Three and a half divided by seven-eighth equals seven over two times eight over seven equals fifty over fourteen equals four
Recall that the volume of a regular prism is given by the area of the base times the height.
Given that the base of the prism is a regular pentagon with an apothem of 2.8 centimeters.
The pentagon consist of 5 isosceles triangles with the apothem as the height and the side of the pentagon as the base.
Recall that the are of a triangle is given by 1/2 base times height.
Thus the area of of the pentagon base of the prism is given by

Therefore, the volume of the prism is given by
C, i think you forgot an x
(x+11)+(x-7)
x+11+x-7
x+x+4
2x+4