(1 point) Find the linear approximation of the function 9(33) : '5/1 + a: at a : 0 and use it to approximate the numbers {70.91 and {71.4. Linear approximation is L(m) : 1+(1/5)x iii 5 0.91 a $1.4 % (1 point) The diameter of a spherical tumor was measured to be 19 mm. lfthe diameter increases by 1.8 mm, use linear approximations to estimate the relative changes in the volume (V : gm) and surface area (S : 47113). Relative change in volume is Relative change in surface area is ::: (1 point)Approximate the value of (4.9)3 using a tangent line approximation. (4-9)3 m 55 (Enter your answer as a fraction or a mixed number. You do not need to reduce to lowest terms.)