Which expression describes the area in square units of the rectangle that has a length of 10x^3y^4 units and a width of 5x^2y units?

Answer 1

area = length * width
= 10x^3y^4 * 5x^2y
= 10*5 x^(3+2) y^(4+1)
= 50 x^5 y^5