Which number is the closest approximation to the value of the square root of 167

The graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.

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 cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).