Ben has a coupon for an additional 15% off the sale price of any item in a store. He uses his coupon to buy a shirt whose sale price is already 20% off the original price. He pays $14.96, and there is no sales tax. What is the original price of the shirt?

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?