Where would I start to find my numbers for the formula

Farnesene is a sesquiterpene. how many different isomers arising from double-bond isomerizations are possible? g

The rumpart family is building a new room onto their house. the width of the new room will be 16 feet. the length of the room will be 4% greater than the width. write an expression to find the length of the new room. what will be the area of this new room?

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).