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A man starts walking north at 2fts2\frac{\text{ft}}{\text{s}} from a point PP. Five minutes later a woman starts walking south at 5fts5\frac{\text{ft}}{\text{s}} from a point 500ft500\text{ft} due east of PP. At what rate are the people moving apart 15min15\text{min} after the woman starts walking? (Round your answer to two decimal places.)\newlineft/s\text{ft}/\text{s}

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Q. A man starts walking north at 2fts2\frac{\text{ft}}{\text{s}} from a point PP. Five minutes later a woman starts walking south at 5fts5\frac{\text{ft}}{\text{s}} from a point 500ft500\text{ft} due east of PP. At what rate are the people moving apart 15min15\text{min} after the woman starts walking? (Round your answer to two decimal places.)\newlineft/s\text{ft}/\text{s}
  1. Convert to seconds: Convert the time from minutes to seconds for both the man and the woman.\newlineThe man starts walking and continues for 55 minutes before the woman starts, plus an additional 1515 minutes after the woman starts walking. This is a total of 2020 minutes for the man.\newline55 minutes + 1515 minutes = 2020 minutes\newlineConvert 2020 minutes to seconds: 2020 minutes * 6060 seconds/minute = 151500 seconds.\newlineThe woman walks for 1515 minutes.\newlineConvert 1515 minutes to seconds: 1515 minutes * 6060 seconds/minute = 151566 seconds.
  2. Calculate distances: Calculate the distance each person has walked.\newlineThe man walks at 2ft/s2\,\text{ft/s} for 1200s1200\,\text{s}.\newlineDistance =speed×time= \text{speed} \times \text{time}\newlineDistanceman=2ft/s×1200s=2400feet\text{Distance}_{\text{man}} = 2\,\text{ft/s} \times 1200\,\text{s} = 2400\,\text{feet}\newlineThe woman walks at 5ft/s5\,\text{ft/s} for 900s900\,\text{s}.\newlineDistancewoman=5ft/s×900s=4500feet\text{Distance}_{\text{woman}} = 5\,\text{ft/s} \times 900\,\text{s} = 4500\,\text{feet}
  3. Determine positions: Determine the positions of the man and the woman relative to point PP. The man is 24002400 feet north of point PP. The woman is 45004500 feet south of point 500500 feet east of PP.
  4. Calculate north-south distance: Calculate the distance between the man and the woman in the north-south direction.\newlineSince the man is walking north and the woman is walking south, their distances add up in the north-south direction.\newlineTotal north-south distance = Distanceman+Distancewoman\text{Distance}_{\text{man}} + \text{Distance}_{\text{woman}}\newlineTotal north-south distance = 24002400 feet + 45004500 feet = 69006900 feet
  5. Use Pythagorean theorem: Use the Pythagorean theorem to find the total distance between the man and the woman.\newlineThe distance between the man and the woman forms the hypotenuse of a right triangle, with one leg being the total north-south distance and the other leg being the east-west distance (500500 feet).\newlineLet dd be the hypotenuse.\newlined2=(Total north-south distance)2+(East-west distance)2d^2 = (\text{Total north-south distance})^2 + (\text{East-west distance})^2\newlined2=69002+5002d^2 = 6900^2 + 500^2\newlined2=47610000+250000d^2 = 47610000 + 250000\newlined2=47860000d^2 = 47860000\newlined=47860000d = \sqrt{47860000}\newlined6918.26d \approx 6918.26 feet
  6. Calculate rate of increase: Calculate the rate at which the distance between the man and the woman is increasing after 1515 minutes the woman starts walking.\newlineThe man and the woman are moving in perpendicular directions, so their speeds add up directly to give the rate at which they are moving apart.\newlineRate == speed\_man ++ speed\_woman\newlineRate == 22 ft/s ++ 55 ft/s == 77 ft/s

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