Please help I have posted each question and havent gotten any answers I have tried everything and dont get it one bit. If a wave passes a point 4 times in one second traveling at 1200 m/s, what is the length of the wave?

What is the speed of a wave that is 35m long with a frequency of
100 Hz?

How long is a wave traveling at 120 m/s if it has a frequency of 30 Hz?

What is the frequency of a violet light with a wavelength of 12,000 m?

Yellow light has a greater frequency than green light. Which has a longer wavelength?

8. The waves used by a microwave oven to cook food have a frequency of
2.45 x 109 Hz. Calculate the wavelength of this type of wave.

An x-ray has a wavelength of 5.0 x 10-9 m. What is the frequency of x-rays?

If a wave is traveling at 145 m/s, what is the frequency of a 15 m long
wave?