What is 2.8 as a fraction in simplest form

If f(x)=2x^6+x^2+2 then what is the remainder when f(x)is divided by x+2

Evaluate the given expression if m=45 |-3m|

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