Given the function f(x)=x^2+3x+5, what is the average rate of change of the function between x=1 and x=3?

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Which of the following is correct interpretation of the expression -4+13

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