Help pl :(

Solve for C.

c/18= 30/12

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

If rt is greater than ba, which statement must be true ?

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air