Final answer:
To calculate the cost of one mushroom when 12 mushrooms cost $3, divide $3 by 12 to get $0.25 per mushroom.
Step-by-step explanation:
To find out how much one mushroom costs, we need to divide the total cost by the number of mushrooms. The question states that 12 mushrooms cost $3 in total. This is a simple division problem where the cost per unit is determined by dividing the total cost by the total number of units (mushrooms in this case).
Here's the calculation:
Determine the total cost of the mushrooms, which is $3.
Determine the total number of mushrooms, which is 12.
Divide the total cost by the number of mushrooms to find the cost per mushroom: $3 ÷ 12 mushrooms.
Carrying out the division we get $0.25, which is the cost of one mushroom.
So, one mushroom costs $0.25.