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A stationary police car emits a sound of frequency 1225 Hz that bounces off of a...

A stationary police car emits a sound of frequency 1225 Hz that bounces off of a car on the highway and returns with a frequency of 1265 Hz. The police car is right next to the highway, so the moving car is traveling directly toward or away from it.

What frequency would the police car have received if it had been traveling toward the other car at 22.0 m/s?

P/s: the car was moving 5.53 m/s

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