Final answer:
To find the opening price of the stock in the beginning of the day, we use the given information and set up an equation to solve for the unknown opening price.
Step-by-step explanation:
To find the opening price of the stock in the beginning of the day, we need to calculate the original price before the 4.25% decrease. Let's call the opening price 'x'.
We can set up an equation to solve for 'x' using the given information: x - (0.0425x) = 30.64. Simplifying the equation, we have 0.9575x = 30.64. Dividing both sides of the equation by 0.9575, we find that x ≈ 31.9893.
Therefore, the opening price of the stock in the beginning of the day was approximately $31.99.