When you take the exit ramp off the expressway and merge onto the next road, you see yellow lines dividing the roadway. what do the yellow lines tell you about the traffic flow?

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

You can decrease the resistance of a length of wire by