What decimal is equivalent to 19/27

Of four points are collinear, they are also coplanar

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?