If a wave has a speed of 200 m/s and a wavelength of 20 meters, what is the frequency?

you cant possibly have a wave going 200 meters per second or miles per second so then it would be 10

Explanation: test i did

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 : )

k2s for potassium sulphide