What number is equivalent to 43?

I'm being volume of cylinder with 13 in. radius and 30 in height answer choices in pic

Sara needs to take a taxi to get to the movies the taxi charges $4.00 for the first mile and then $2.75 for each mile after that if the total charge is $20.50 then how far was sara’s taxi ride to the movie

Explain how you do each step what term makes it inconsistent y=2x - 4 ?