To determine the total cost \( c \) Vicky paid for the oranges, we can set up the equation based on the given information:
- Vicky bought 312 pounds of oranges.
- Each pound costs $3.90.
The total cost can be represented with the equation: \[ c = 312 \times 3.90 \]
To express this in terms of an equation involving \( c \) and other variables, we rearrange it: \[ c = 3.90 \times 312 \]
To answer your question regarding the options provided, none of the options presented correctly represent this relationship. However, if the equation is to be written in a form similar to the options, it would likely look something like: \[ c = 3.90 \times 312 \] or \[ 3.90c = 312 \]
From the calculation above, the total cost would be: \[ c = 312 \times 3.90 = 1216.80 \]
Thus, she did not pay $0.90 or $1.11 or $13.65 based on the information you provided. Instead, she paid $1216.80. None of the options given are correct representations of her spending.