Answer:
Let x equal the recurring decimal:

Create another number with recurring 216s by multiplying the above expression by 1000:

Subtract Equation 1 from Equation 2 to eliminate the recurring digits after the decimal:


Divide both sides by 999:


Simplify:

Answer:
$25 a lamp
Step-by-step explanation:
First divide $10,000 by 500 lamps to find how much one of them cost
That is $20 a lamp so then multiply .25 *20 or 1/4 *20
you get 5 than add 20 +5=25