To determine the time when the order from Client 1 is completely served, we analyze the preparation steps outlined below:
| Item | Preparation Time |
|---|---|
| Burger | 10 minutes |
| Ice Cream | 2 minutes |
| Fries | 5 minutes |
Order Summary for Client 1:
| Order | Burgers | Ice Creams | Fries |
|---|---|---|---|
| Client 1 | 1 | 2 | 2 |
Step-by-step Preparation:
As all items for Client 1 are completed by 10:10, the order is entirely served at this time.
Conclusion: Client 1's order is completely served at 10:10.




| A | B | C | D | Average |
|---|---|---|---|---|
| 3 | 4 | 4 | ? | 4 |
| 3 | ? | 5 | ? | 4 |
| ? | 3 | 3 | ? | 4 |
| ? | ? | ? | ? | 4.25 |
| 4 | 4 | 4 | 4.25 |
For any natural number $k$, let $a_k = 3^k$. The smallest natural number $m$ for which \[ (a_1)^1 \times (a_2)^2 \times \dots \times (a_{20})^{20} \;<\; a_{21} \times a_{22} \times \dots \times a_{20+m} \] is: