Given f(x) = -x2 + 4 and h(x) = 2x.​

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).

Do,h = (7, 9) (14, 18) the scale factor is

Including 6% sales tax, an inn charges $135.68 per night. find the inns nightly cost