Please help!

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\fUse the quotient rule to find the derivative of - 4 sin(x) + 2 5x4 + 4 You do not need to expand out your answer. Be careful with parentheses!Where, on the interval 0, 27], does the following function have a horizontal tangent line? f(x) = 13 cos(x) + 3x f (a) has horizontal tangents at * = Note: Answer in radians. Round answers to 4 decimal places.The height of a projectile (in meters) w minutes after it has been launched is given by f(a:) = 4m + 8sin(m) Find the velocity function, a = Find where on the interval from [0, 7r] the projectile has a velocity of zero, Use your previous answer to find the height of the projectile when its velocity is zero rounded to three decimal places