Answer:

Explanation:
The speed of the sound wave is:


The frequency is:



By definition, 1 astronomical unit (AU) is the distance from the Earth to the Sun, and this is equivalent to around 150,000,000 km, or 1.5 x 10^8 km. This is also equivalent to 1.5 x 10^11 meters. Therefore, if we are given the distance in meters, we have to divide by 1.5 x 10^11 to convert to AU. This is the third choice.
I'm not writing your essay... but many children and teens are affected by what they see on TV and there is no exception when it comes to their favorite sports player.
Answer:
i think it’s d, but i’m not sure.
Explanation:
Sales tax is regressive, the second is progressive, and the third is proportional.