Iam having trouble with this one : (

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?

Meg constructed triangle poq and then used a compass and straightedge to accurately construct line segment os, as shown in the figure below, which could be the measures of angles pos and angle poq?

How many and of which kind of roots does the equation f(x)=2x^4−9x^3+17x^2−16x+6 have?