Select ALL statements that show correct reasoning for finding 15 divided by 2/9. a. multiply 15 by 2, then divide 9.
b. multiply 15 by 9, then divide 2.
c. multiply 15 by 1/9, then multiply by 2.
d. multiply 15 by 9, then multiply by 1/2.

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?