Final answer:
To find out the cost of 4 markers, divide the total cost by the number of markers, and then multiply the cost per marker by 4.
Step-by-step explanation:
To find out how much 4 markers will cost, we need to calculate the cost per marker first. Grace bought 5 markers for $4.75. We divide the total cost by the number of markers: $4.75 ÷ 5 = $0.95. So, each marker costs $0.95. To find the cost of 4 markers, we multiply the cost per marker by the number of markers: $0.95 × 4 = $3.80. Therefore, 4 markers will cost $3.80. The correct answer is option A, $3.80.