Astone falls from the top of a cliff into the ocean. in the air it had an average speed of 16m/s. in the water it had an average speed of 3m/s before hitting the seabed. the total distance from the top of the cliff to the seabed is 127 meters and the stone's entire fall took 12 seconds. how long did the stone fall in air and how long did it fall in the water?

Let t represent the time the stone fell in the air.

distance = speed * time

t*16 + (12-t)*3 = 127 . . . . . total length of travel
13t = 91
t = 7 . . . . . time in air

The stone fell 7 seconds in the air, then 5 seconds in the water.

In all honesty, there really is no “work” per say to show. mainly it’s just using the process of elimination. the question is asking which domain(s) would be the most appropriate for the function c(n). n is the number of observed vehicles so right away, 1, 2, and 3 can be eliminated.why? 1, 2 start in the negatives and therefore it is impossible to observe negative cars. so, #4 would be the best answer to the given problem.