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6. [-/1 Points] DETAILS LARCALCET7 3.7.022. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A construction worker pulls a five-meter plank up the side of a building under construction by means of a rope tied to one end of the plank (see figure). Assume the opposite end of the plank follows a path perpendicular to the wall of the building and the worker pulls the rope at a rate of 0.14 meter per second. How fast is the end of the plank sliding along the ground when it is 2.3 meters from the wall of the building? (Round your answer to two decimal places.) Need Help? Pa m/sec 7. [-/1 Points] DETAILS LARCALCET7 3.7.025.MI. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER An air traffic controller spots two airplanes at the same altitude converging to a point as they fly at right angles to each other. One airplane is 150 miles from the point and has a speed of 600 miles per hour. The other is 200 miles from the point and has a speed of 800 miles per hour. (a) At what rate is the distance between the planes changing? Need Help? Need Help? mph (b) How much time does the controller have to get one of the airplanes on a different flight path? h 8. [-/1 Points] DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The combined electrical resistance R of two resistors R₁ and R₂, connected in parallel, is given by the equation below, where R, R₁, and R₂ are measured in ohms. R₁ and R₂ are increasing at rates of 0.6 and 1.3 ohms per second, respectively. 1 1 Which Pa + R R₁ R₂ At what rate is R changing when R₁ = 49 ohms and R2 = 84 ohms? (Round your answer to three decimal places.) ohm/sec LARCALCET7 3.7.037. www.