write the equation and find the values of x. round side lengths to the nearest tenth and angle measures to the nearest degree ​

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?

Which is the focus of a parabola with equation y2=4x

How is this equation completed? i cannot find any examples in the book.