829 rounded to the nearest ten and hundred is

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?

Which of the following shows the length of the third side, in inches, of the triangle below

Find the solution(s) to x^2-14+49=0