Question 4 0/5 pts O 2 0 Details Use linear approximation, i.e. the tangent line, to approximate 19.4 as follows: Let f(x) = c' and find the equation of the tangent line to f() at r = 19. Using this, find your approximation for 19.42 Submit Question Question 5 0/5 pts ) 2 0 Details Let y = 4x' + 8x + 4. If Ax = 0.4 at x = 4, use linear approximation to estimate Ay Ay = Submit