1/2 x 2/3 =
plesae help me

Describe the possible echelon forms of the standard matrix for a linear transformation t where t: set of real numbers is onto.

Find the gradient of f(x,y,z)equals=left parenthesis x squared plus y squared plus z squared right parenthesis superscript negative 1 divided by 2 baseline plus ln left parenthesis x right parenthesis x2+y2+z2−1/2+ln(xyz) at the point left parenthesis negative 2 comma 1 comma negative 2 right parenthesis(−2,1,−2).

If the dimensions of a rectangular prism are 5 ft x 3.5 ft x 2 ſt, what is the surface area?