Which results from a cross section made perpendicular to be base of a square pyramid

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

Find the area of an equilateral triangle with a side of 6 inches

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