So the question tells to express the expression in your problem where N0 is N-naught and the symbol represent the lower case Greek letter lambda. So the best answer or expression would be that the lambda is the wavelength of the expression. I hope you are satisfied with my answer
2.1 is already in a decimal form.
Hope I helped!
Answer:
rule add 15 subtract 10
Step-by-step explanation:
rule add 15 subtract 10
