Please help me with these problems asap!

11. [-/1 Points] DETAILS LARCALC11 2.4.117. Let u be a differentiable function of x, in exercise 123, the following result is proved. u d.x [lu] = u' , u * 0. u Use this result to find the derivative of the function. h(x) = |2x/cos(3x) h ' ( x ) = Need Help? Read It Watch It1U. [-I1 Points] LARCALC11 2.4.101. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHE The frequency Fof a fire truck siren heard by a stationary Observer is given below, where i v represents the velocity of the accelerating fire truck in meters per second (see figure). (Round your answers to 3 decimal places). 7 131,100 7 327 1 v (.3) Find the rate of Change of Fwith respect to v when the fire truck is approaching at a velocity of 28 meters per second (use 7v). we : E (b) Find the rate of change owaith respect to v when the fire truck is moving away at a velocity of 28 meters per second (use Hi). me, = Z Need Help? 5. [-/1 Points] DETAILS LARCALC11 2.4.066. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Find the slope of the graph of the function at the given point. Use the derivative feature of a graphing utility to confirm your results. (If an answer is undefined, enter UNDEFINED. Round your answer to three decimal places.) 3 f ( x ) = (6, 1/12) ( x2 - 5x) 2 f ' ( 6 ) = Need Help? Read It1. [-/1 Points] DETAILS LARCALC11 2.4.008. Complete the table. y = f(g(x)) u = g(x) y = f(u) 3x y = sin U = y 8 = sin u Need Help? Read It