The frequency F of a fire truck siren heard by a stationary observer is given below, where ± v represents the velocity of the accelerating fire truck in meters per second (see figure). (Round your answers to 3 decimal places). 130,600 F = 318 + V (a) Find the rate of change of F with respect to v when the fire truck is approaching at a velocity of 20 meters per second (use -v). (b) Find the rate of change of F with respect to v when the fire truck is moving away at a velocity of 20 meters per second (use +v).

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