2 over 3 divided by 6

If a • b*2 = 1.8 x 10*-7, and c•b/d = 7.2 x 10*-4, find the value of a•d*2/c*2

Abcd is a square. what is the measure of angle bac

Mackenzie needs to determine whether the rectangles are proportional. which process could she use? check all that apply.