What is the length of the radius of a circle with center (10, -14) that is tangent to the line x=13?

The value √10 and √15 are plotted on the number line

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

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?