Do the bois got me? Please bois

What is the smallest integer n such that n\sqrt{2} is greater than 20

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth

The first floor of marcus’ house is 1,440 square feet. he will cover 1,033 square feet with wood and the rest with tile. a box of tiles will cover 11 square feet. how many boxes of tile does marcus need to buy to cover the floor?