Need help with part b

The amount of time in seconds it takes for a swimmer to hear a single, hand-held, starting signal is given by the formula below, where (x,y) is the location of the starter (in meters), (0,p) is the location of the swimmer (in meters), and C is the air temperature (in degrees Celsius). Assume that the starter is located at the point (4, - 2). Answer parts a and b below. p Swimmer t(x,y.p.C) = Vx2 + (y -P) 2 331.45 + 0.6C Starter (4,-2) a. Calculate t(4, - 2,30,20) and t(4, - 2,20,20). Could the difference in time change the outcome of a race? t(4, - 2,30,20) = 0.09390 (Round to five decimal places as needed.) t(4, - 2,20,20) = 0.06511 (Round to five decimal places as needed.) Could the difference in time change the outcome of a race? Yes O No b. Calculate the total differential for t if the starter remains stationary, the swimmer moves from 30 m to 30.5 m away from the starter in the y direction, and the temperature decreases from 20 C to 15*C. Interpret your answer. dt = (Round to six decimal places as needed.)