Patrice's credit card has an apr of 11%, calculated on the previous monthly
balance, and a minimum payment of 2%, starting the month after the first
purchase. her credit card record for the last 7 months is shown in the table
below.

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).

Ineed with this problem 21 show steps

Due to financial difficulties the owner of 4 skateboard stores is going to close 2 of his stores. based on the money earned at each store, which two stores should remain open?