When looking at the effect of PH on sucrase activity, what was the wavelength of light used in the spectrophotometer?

Can someone explain to me how to do this problem ?

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.)

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?