If the magnetic field strength is found to be zero between the two wires at a distance of 1.9 cm from the first wire, what is the magnitude of the current in the second wire

Acurve connects the data points that are plotted. (physical science chapter 11 motion)

Aplane takes off from an airport and flies to town a, located d1 = 215 km from the airport in the direction 20.0° north of east. the plane then flies to town b, located d2 = 230 km at 30.0° west of north from town a. use graphical methods to determine the distance and direction from town b to the airport. (enter the distance in km and the direction in degrees south of west.)

If gases like carbon dioxide and methane make up less than 1% of the total atmosphere, why is it important for scientists to monitor changes in percentages of these gases?