Mr. lester needs to store 23 science books for his class on a shelf @ the back of the classroom. each science book is 2.6 centimeters thick. if mr. lester stacks the science books on top of each other on the shelf, how tall does the shelf have to be?

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.