Identify the dilation(reduction or enlargement) and find the scale factor. PLEASE HELP HOW DO I FIND THE ANSWER?

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

Find dy/dx using implicit differentiation ln(20+e^xy)=y

George is putting trim around his rectangular deck, including the gate. he will need 44 feet of trim to do the entire deck. if the deck is 13 feet long, how wide is the deck?