Final answer:
The store sold 150,000 t-shirts in their second year of business.
Step-by-step explanation:
To find out how many t-shirts the store sold in their second year, we need to know the relationship between the years and the number of shirts sold. If the store sold 300,000 shirts in their fourth year, we can assume that the number of shirts sold is increasing at a constant rate.
We can set up a proportion to solve for the number of shirts sold in the second year:
x/300,000 = 2/4
Cross multiplying, we get:
4x = 600,000
Dividing both sides by 4, we find that x = 150,000.
Therefore, the store sold 150,000 t-shirts in their second year of business. The answer is option A.