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hram777 [196]
3 years ago
10

A car travels down a highway at 25 m/s. An observer stands 150 m from the highway.

Mathematics
1 answer:
makvit [3.9K]3 years ago
8 0
Let x be the distance (in feet) along the road that the car has traveled and h be the distance (in feet) between the car and the observer.

(a) Before the car passes the observer, we have dh/dt < 0; after it passes, we have dh/dt > 0. So at the instant it passes the observer we have dh/dt = 0, given that dh/dt varies continuously since the car travels at a constant velocity.
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