Answer:
The floor, in square feet, you need to tile is

Explanation:
This problem bothers on the mensuration of solid shapes.
To solve this problem we need to calculate the areas of the sink and the bathtub and subtract it from the the area of the the bathroom, the result is the amount of space you need to tile
Step one
Area of sink
Area of bathtub

Area of bathroom

Step two
To calculate the area we need to tile
let us subtract the areas of the bathtub and the sink from the bathroom we have
