When tax is added to to the cost of lipstick, it’s price increases from $16.50 to $18.48. What is the rate at which tax it’s charge

The sixth grade art students are making a mosaic using tiles in the shape of right triangles.each tile has leg measures of 3 centimeters and 5 centimeters.i f there are 200 tiles in the mosaic what is the area of the mosaic.