Simplify

3{10 + 7{15 - 6{10 - 4{15

3{10 - 3{15
3{15 - 3{10
3{30 - 3{20
3{20 - 3{30

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.