If a 14 karat gold necklace weighs 1.8 ounces how many ounces of pure gold does it contain

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

Is the power produced directly proportional to the wind speed, give reasons for your answer?

Patty made a name tag in the shape of a parallelogram. reilly made a rectangular name tag with the same base and height. explain how the areas of the name tags compare.