At lunch, one of your friends orders two cheeseburgers and five salads for your table and it costs her $9.25. Another friend orders six cheeseburgers and 2 salads and it costs her $11.50.
How much does it cost for one cheeseburger? How much does it cost for one salad?

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?