I honestly need help. I did the first one already but don’t understand the second and last.

About 60% of the normal humanbeing's body weight is composed ofwater. how much of a 125 poundperson is water weight? f 72 pounds h 76 poundsg 75 pounds i 80 pounds

What is the remainder when 2872 is divided by 76? a) 51 b) 57 c) 60 d) 63

Describe the relationship between the angles of similar triangles and the sides of similar triangles