T-9 < -6 solve for me pls

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

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

Anna is constructing a line segment that is congruent to another segment ab. for the construction, which tool should be used to mesure segment ab