Tom is twice his sister's age his sister is 2 less than a score but 5 years younger than Rob.

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ab=9, and ac=12, find hc.

What are the equivalent ratios for 24/2= /3= /5.5=108/ = /15

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?