If answered i will follow u on instagram if u want: someone me with this problem

What is the y intercept of f(x)=(1/2)^x?

What is the upper quartile in the box plot?

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