M (Points: 12) The pressure, P (in lbs/ft?), in a pipe varies over time. Three times an hour, the pressure oscillates fr

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M Points 12 The Pressure P In Lbs Ft In A Pipe Varies Over Time Three Times An Hour The Pressure Oscillates Fr 1 (43.79 KiB) Viewed 34 times

M (Points: 12) The pressure, P (in lbs/ft?), in a pipe varies over time. Three times an hour, the pressure oscillates from a low of 90 to a high of 230 and then back to a low of 90. The pressure at t=0 is 90. M 230 (a) Graph P = f(t), where t is time in minutes, (b) Find a possible formula for P = f(). 140 (c) Using your graph from part (a) P = f(t) for 0 st < 20, estimate when the pressure first equals 125 lbs/ft? C90 (12 -200 -cos 1/3 = 21/8 y=-7000s (6x490. Br=60 B=6 p-2016 -150 -107 y=-70 cos (6x) 190 K=360"/p p= 120° or n/3 360/120-3-U 50 1 (minutes) y=-70 cos How do you find K? Answer key says solchon is Pa-To cos (Vot) 60 d=Maxrmin/2 2.300 90/2=d d=160 a=70