Which property can ne used to solve the equation 5d=75

Division property is used to solve the problem

The area of the rug is calculated using   pi (3.14) x radius squared. so work it backwards..  50.24 divided by pi (3.14) will give you the radius squared because you have made it the subject. this gives you 16. then square root 16 to give you the radius on its own. this is 4. you know the diameter is double the radius so 4 x 2 = 8. this is the diameter.