5/9 + 1 5/7 x (4 2/3 - 2 5/8 ) divided by 1 3/4 I need this step by step pls thanks :)

You will get 25 points an image of a rectangular prism is shown below: part a: a cross section of the prism is cut with a plane parallel to the base. what is the name of the shape created by the cross section? explain your answer. (5 points) part b: if a cross section of the prism is cut perpendicular to the base, what would be the shape of the resulting cross section? explain your answer. (5 points)

Can someone me and do the problem plz so i can understand it more better

Olga used 100 ounces of flour to make 225 muffins. how many ounces of flour will be used to make 300 muffins?