the number of floors tiles depends on the area of the wall to be covered. if 190 tiles cover 100 square feet, how many tiles will john need to cover a 3 feet by 38 feet hallway? what is the rate of change?

John needs 217 tiles.

Rate of change is 1.9 tiles per square foot

Step-by-step explanation:

Hallway area=3•38=114 ft²

Rate of change=190/100=1.9 tiles/ft²

Tile total=

T=area•rate

=114•1.9

T=216.6

(Round up because tiles are sold as whole units)

Total tiles=217