a block of apartments have 20 floors with 20 windows on each floor how many windows does the block have all together

Can someone check my answer? you

Identify the converse of the following conditional: if a point is in the first quadrant, then its coordinates are positive. if the coordinates of a point are not positive, then the point is not in the first quadrant. if the coordinates of a point are positive, then the point is in the first quadrant. if a point is in the first quadrant, then its coordinates are positive. if a point is not in the first quadrant, then the coordinates of the point are not positive.

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5