Question: A specialty electronics company makes an ultrasonic device to repel animals. It emits a 2025 kHz sound (above those heard by people), which is unpleasant

A specialty electronics company makes an ultrasonic device to repel animals. It emits a 20–25 kHz sound (above those heard by people), which is unpleasant to animals. The sound covers an elliptical area starting at the device, with the longest dimension extending 120 ft from the device and the focus of the area 15 ft from the device. Find the area covered by the signal. (A = πab)

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