Cos -6pi /17 exact value

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?

I’m confused on how to work the pie charts

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.