What's is 5% of $10.00

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.

The weight of an object in the water is 7% of its weight out of the water. what is the weight of a 652g object in the water?

Is the figure congruent? yes or no?