Will mark brainliest and 23 points use the formula sa=6s2 , where sa is the surface area and s is the edge length of the cube, to solve this problem. eliz must cover a cube-shaped box with giftwrap. the edge length of the box is 312 feet. what is the surface area of the box? enter your answer, as a mixed number in simplest form, in the box. ²

The discrete random variables x and y take integer values with joint probability distribution given by f (x, y) = a(y−x+1) 0 ≤ x ≤ y ≤ 2 or =0 otherwise, where a is a constant. 1 tabulate the distribution and show that a = 0.1.2 find the marginal distributions of x and y. 3 calculate cov(x, y).4 state, giving a reason, whether x and y are independent. 5 calculate e(y|x = 1).