The train travels at an average speed of 68 miles per hour for the first 2 hours and at an average speed of 80 miles per hour for the next 4 hours. what was the train's average speed for the 6 hour trip?

If the car had not hit the fence, how much farther would it have skidded? solve the skid-distance formula to find the extra distance that the car would have traveled if it had not hit the fence. round your answer to two decimal places. note that unit conversion is built into the skid distance formula, so no unit conversions are needed.