Answer: Patrick invested €7,280 in the special savers bank account.
Explanation:
If the money in the bank account earned 4% interest after one year, then the amount of interest earned is 4/100 * the amount invested. We can write this as an equation as follows:
4/100 * amount invested = €291.20
Solving for the amount invested, we get:
4/100 * amount invested = €291.20
amount invested = €291.20 / (4/100)
= €291.20 / 0.04
= €7,280
Therefore, Patrick invested €7,280 in the special savers bank account.