Using scientific notation, what is the solution to (2.82 * 104) * (3.1 * 103)?

8.742 * 107

8.742 * 106

87.42 * 107

8.742 * 101

The slope of cd is which segments are perpendicular to cd ? select each correct answer. gf , where g is at (6, 5)and fis at (10, 2) ef, where e is at (4, 1) and f is at (7,5) lm , where lis at (-2, 3) and m is at (-10, 9) jk , where jis at (1, -2) and k is at (10, – 14) next