Are these ratios equivalent? 84,000 paintings for every 16,000 photographs 63,000 paintings for every 12,000 photographs

How do you find principle and simple interest

Which statement justifies why angle ebc measures 90?

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15