Answer:
absolute brightness
Explanation:
The observational fact about a cepheid variable star that leads to a measurement of its distance from earth is that its period of variation is directly related to its absolute brightness
You should write out y=mx+b and then plug in 1/4 to the m and then plug in the x and numbers to solve for b
Answer: Pastoral nomads
Explanation: Pastoral nomads are producers of food, and the size of their tribal or ethnic units increases accordingly. These groups raise livestock, and they move about within their established territory to find good pastures for their animals.
Hey there,
They both have grassy and green lands and they are basically used for farming and crops and things like that.
~Jurgen