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Use Pythagoras and your given info to set up the problem and find the rate

at which the driver is going.

The hypoteneuse of the triangle formed is length 3/2 and dD/dt=-136.

dy/dt=0 because the chopper is at a constant height of y=1.

Since y=1 and D=3/2, then use Pythagoras to find the horizontal distance

the car is from the chopper.

The chopper is flying at 120 if we label that side of the triangle x and let

dx/dt=120. The trick is noting that the chopper and the car are

approaching one another. The chopper at dx/dt=120 and the car at, say, dz/dt=?

That is what must be found.

That depends. What's the speed limit and how hard-nosed is the cop?.Should the driver of the car be given a ticket for speeding?