Can someone please answer 1 and 2

Write an inequality and solve each problem.for exercises 11 and 12, interpret the solution.

How do you write something in scientific notation?

Will mark determine whether the conjecture is true or false. give a counterexample for any false conjecture. given: points r, s, and t conjecture: r, s, and t are coplanar. a) false; the points do not have to be in a straight line. b) true c) false; the points to not have to form right angles. d) false; one point may not be between the other two.