Jennifer has watched 42 minutes of a movie, which is 20% of the movie. What is the total length in minutes of the movie?

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

This question awards 100 ! i really don’t want to fail i will also mark you !

Simplify the following expression 48^1/2