Final answer:
To find the total cost Vicky paid for 3 1/2 pounds of oranges at $3.90 per pound, you multiply the quantity by the price, resulting in a total cost of $13.65.
Step-by-step explanation:
The combination of provided examples from various chapters shows that to find the total cost of fruit Vicky bought, you need to multiply the quantity by the price per pound. Vicky bought 3 1/2 pounds (or 3.5 pounds) of oranges at a price of $3.90 per pound. The equation that represents the total cost, c, she paid for the oranges is:
3.90c = 3.5
To find the amount of money Vicky spent, we multiply 3.5 by 3.90:
3.5 x 3.90 = $13.65
Therefore, Vicky paid $13.65 for the oranges.