The manager of a campus bookstore finds that in the last hour before closing, 41 students bought two or more textbooks. Of these 4 used cash only, 5 used a financial aid voucher only, and 5 used a debit card only. Seven used a debit card and financial aid voucher and no cash; three used cash and debit card with no financial aid assistance. Sixteen students total used a debit card for a least part of their purchase, while 9 used none of those forms of payment. (a) How many students used all of cash, debit card, and financial aid voucher?
(b) Did more students use cash or financial aid vouchers?
(c) What percentage of students did not use a financial aid voucher?

Part a what is the area of triangle i? show your calculation. part b triangles i and ii are congruent (of the same size and shape). what is the total area of triangles i and ii? show your calculation. part c what is the area of rectangle i? show your calculation. part d what is the area of rectangle ii? show your calculation. part e rectangles i and iii have the same size and shape. what is the total area of rectangles i and iii? show your calculation. part f what is the total area of all the rectangles? show your calculation. part g what areas do you need to know to find the surface area of the prism? part h what is the surface area of the prism? show your calculation. part i read this statement: “if you multiply the area of one rectangle in the figure by 3, you’ll get the total area of the rectangles.” is this statement true or false? why? part j read this statement: “if you multiply the area of one triangle in the figure by 2, you’ll get the total area of the triangles.” is this statement true or false? why?