mary bought 8 pounds of granola at 3.10 a pound for a family hiking trip how much did spend altogether?​

Can some one me with these questions

Secant be and cf intersect at point d inside a what is the measure of cde

You have a square piece of cardboard that measures 14 inches on each side. to build a box, you cut congruent squares out of each corner of the cardboard. use the picture to find the area of the cardboard you were used to build the box