9. AM 630 is a station where you can listen to sports. The frequency is 630 khz (or 630,000 hz). What is the wavelength?
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475861.044 is the wavelength

Explanation:

wavelength= speed/frequency

speed of light equals 299,792,458

and the frqeuncy equals 630

so  299,792,458/630=475861.044 equals the wavelength

i guess that visual aids present persuasive examples to what you are presenting, some factors would be theme (does it fit with the color, information, what you are presenting), size (can you see it, is it a big enough span of data/information), and overall look of the visual aid.

hope this : )

mass and volume are the answers you are looking for