Answer:
Allan Sandage
Explanation:
Allan Sandage is an american astronomer that has undertaken extensive efforts to evaluate Hubble's constant rate of universe expansion.
in the beginning of his career in 1958 , the primary focus of Allan is to evaluate the Hubble's constant rate.
He used many different techniques to determine the distance to several galaxies. From these many different calculations, average value of Hubble's constant was about 50 km/sec/megaparsec.
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In invasion of Afghanistan occurred after 9/11. The public aims were to dismantle al-Qaeda and deny it a safe base of operations in Afghanistan by removing the taliban from power. Therefore, the invasion of Afghanistan was a direct result of the attacks of 9/11
The Nile played a significant role in supporting Egypt's predominantly agrarian economy. The river brought excellent silt and flooded the crops that were next to it.
Ancient Egypt's culture owed a lot to the Nile River and its reliable seasonal floods. The Egyptians were able to create an economy based on abundant agriculture thanks to the river's regularity and the region's fertile land.
Grain was the first crop grown in Egyptian agriculture following the flood season (also known called the Season of the Inundation). Ancient Egyptian farmers would plant vegetables after harvesting the grain. Large grain storage were built by the Egyptians to keep the grain dry and fresh.
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Factors that cause a producer’s average cost per unit to fall while output rises are known as "<span>c. economics of scale". This is what happens when the size of a production operation increases which reduces costs of labor, maintenance, etc. </span>
