A police car is moving at 39.7 m/s (88.8 mi/h) behind a speeding car that is going faster. The speed limit is 29.1 m/s (65.0 mi/h). A police car radar "clocks" the speed of the other car by emitting microwaves with frequency 2.5e10 Hz and observing the frequency of the reflected wave. The reflected wave, when combined with the outgoing wave, produces beats at a rate of 1432 s-1. How fast is the speeder going?