If something cost $50 and the markup is 10% . what is the selling price

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.

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.