The blue shape is a dilation of the black shape. What is the scale factor of the dilation?

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

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?