work backwards to find x. you start with 40, then subtract 16. now you have 2x= 24. now you have to figure out what multiplied by 2 is 24. 24 divided by 2 is 12, there is the answer. x=12. Always check your work, solve it normally replacing x with 12.
Diameter = 2*radius 14/2=7 Radius is 7in" Circumference of circle formula: 2pi(radius) 2pi(7)= 43.98in of wire required so it can wrap around lamp exactly once.