Find the ratio of the following: 15 minutes to an hour​

What is the measure of ac? 5 units 13 units 26 units 39 units

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.

What is fraction that is equivalent to 3/8