What percentage of births occur after day 12?

Can you draw an isosceles triangle with only one 80 degree angle?

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

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.