Hailey paid \$13$ , 13 for 1\{7} \ start fraction, 3, divided by, 7, end fraction, start text, space, k, g, end text of sliced salami.
What was the cost per kilogram of salami?

The area (a) of a circle with a radius of r is given by the formula and its diameter (d) is given by d=2r. arrange the equations in the correct sequence to rewrite the formula for diameter in terms of the area of the circle.