How to measure side lengths of polygons

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?

Felix wrote several equations and determined that only one of the equations has no solution. which of these equations has no solution?

Dimitri used a coupon that saved him 80 percent, or $6.87. he paid $34.35 for the items. dimitri used a coupon that saved him 80 percent, or $27.48. he paid $34.35 for the items. dimitri used a coupon that saved him 80 percent, or $6.87. the price of the items before the discount was $34.35.dimitri used a coupon that saved him 80 percent, or $27.48. the price of the items before the discount was $34.35.