Please help best one gets brainlist show your work and 5/5

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?

What’s the range cuz i can’t find it?

Awavelength of 610 nm was found to be the most intense wavelength emitted by copper. answer the following questions about this wavelength of light. a) what is this wavelength in cm? b) what is the frequency that corresponds to this wavelength? c) what is the energy of light of this wavelength? d) what is the wavenumber corresponding to this wavelength?