The magnitude and direction of two vectors are shown in the diagram ,what is the magnitude of their sum?

Given a circle with a radius of 4, which is the circumference

How to use order of operation in 20 divide by 4 multiply 5 = 1

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