Please help I will give brainliest

Closing a credit card usually _your debt ratio.a. increasesb. decreasesc. improvesd. has no effect on

The answer is 7.2 how would you put this as money

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?