Final answer:
To find the cost of one marker when a set of 20 markers costs $6, divide $6 by 20, which results in a cost of $0.30 per marker.
Step-by-step explanation:
The question asks us to determine the cost of 1 marker given that Lainey bought a set of 20 markers for $6. To find the cost of one marker, we need to divide the total cost by the number of markers in the set.
Here is the step-by-step calculation:
Identify the total cost of the markers: $6.
Identify the total number of markers: 20.
Divide the total cost by the number of markers to find the cost per marker: $6 ÷ 20 = $0.30.
So, the cost of one marker is $0.30.