Description
In a laboratory experiment, an ultrasound detector located at D is used to measure the distances of two moving objects, P and Q. At a certain moment, P and Q are located as shown in the diagram. What is distance PQ?
6.82 feet5.66 feet
4.74 feet
4.24 feet
3.89 feet
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Р
4.24 ft
?
45°
239
4.24 ft
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