3. find a basis for the nullspace, the row - space and the column - space of the following matrix: 1 2 3 1 1 -1 21 3

Answer this question only if you know the 30 points and

Acircle has a circumference of 2 pi cm. which statement about the circumference and area is true? a comparison of the area and circumference is not possible since the area cannot be determined. the numerical values of the circumference and area of the circle are equal. the numerical value of the circumference is greater than the numerical value of the area. the numerical value of the circumference is less than the numerical value of the area.

Just tell me how to set up the equation.