Help pwease :,( First to get it right gets most!

Mr switzer needs to buy new 1-foot tiles to cover his bathroom floor. the floor is 12 feet long and 8 feet wide. each square foot of tile will cost $1.79. in dollars what will be the total cost of the tiles he needs to buy.

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (-1+i)+(21+5i)+0

The acceleration of an object due to gravity is 32 feet per second squared.what is acceleration due to gravity in inches per second squared?