A car has 16 gallons of gasoline in its tank when it starts it's journey. On a long highway trip, gasoline is used at a rate of about 2 gallons per hour. The gallons of gas, "g", remaining in the car’s tank after "t" hours can be modeled by the function:

After 3 hours of driving, there are 10 gallons left.

g(3) = 10 represents the number of gallons of gas that will remain in the car's tank after 3 hours of driving on the long highway trip.

To understand what g(3) = 10 represents in the given function g(t) = 16 - 2t, we need to substitute t = 3 into the function and evaluate it.

g(3) = 16 - 2(3)
g(3) = 16 - 6
g(3) = 10

So, g(3) = 10 represents the number of gallons of gasoline remaining in the car's tank after 3 hours of driving on the highway trip.