To find the total cost \( c \) that Vicky paid for the oranges, we need to multiply the number of pounds of oranges by the cost per pound.
Vicky bought \( 3 \frac{1}{2} \) pounds of oranges, which can be expressed as a mixed number:
\[ 3 \frac{1}{2} = 3 + \frac{1}{2} = 3 + 0.5 = 3.5 \text{ pounds} \]
The cost per pound is $3.90. The total cost \( c \) can be calculated using the equation:
\[ c = \text{(number of pounds)} \times \text{(cost per pound)} \]
So we have:
\[ c = 3.5 \times 3.90 \]
To compute this:
\[ 3.5 \times 3.90 = 13.65 \]
Therefore, Vicky paid $13.65 for the oranges.
Now, let’s find which equation correctly represents this situation:
- The correct equation that represents the total cost is \( c = 3.5 \times 3.90 \), which corresponds to \( \text{(cost per pound)} \cdot \text{(number of pounds)} = c \), or simply:
\[ 3.5 \cdot 3.90 = c \]
However, the closest option provided is:
- Start Fraction 3.90 over 3.5 End Fraction equals c; Vicky paid $13.65.
So the best response you are looking for (considering alternatives given in your choices) is:
Start Fraction 3.90 over 3.5 End Fraction equals c; Vicky paid $13.65.