What's the square root of 900

What does independent variable and dependent variable mean in math?

Evaluate each expression. determine if the final simplified form of the expression is positive or negative -42 (-4)2 42

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?