Fractions to decimals 19/31

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

You are designing a rectangular pet pen for your new baby puppy. you have 30 feet of fencing you would like the fencing to be 6 1/3 feet longer than the width

Need same math paper but the back now i hope your able to read it cleary i need with hw