HELP ME PLEASE ASAP?!?
A. AC
B. AB
C. AB and BC
D. BC
E. A
F. C

According to statistics a person will devote 32 years to sleeping and watching tv. the number of years sleeping will exceed the number of years watching tv by 18. over a lifetime, how many years will the person spend on each of these activities

An engineer scale model shows a building that is 3 inches tall. if the scale is 1 inch = 600 feet, how tall is the actual building?

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