On a trip a motorist travels at 80 km/h for the first 200 km, and 60 km/h for the remainder of the trip. if the trip is 300 km in total, calculate the average speed for the whole trip.

Because atoms of elements in the same group of thbecause atoms of elements in the same group of the periodic table have the same number of neutrons, they have similar properties. select the best answer from the choices provided t fe periodic table have the same number of neutrons, they have similar properties. select the best answer from the choices provided t f