Oliver is in charge of bringing bottled water to a party that has 33 guests.

Bottled water is sold in packs of 18 and each pack costs $3.6.

Part A: enter the total number of packs of water Oliver will need to bring to the party if each guest is to have 3 bottles of water.

Part B: enter the total cost, in dollars, Oliver will spend on bottled water for the party.

Let's solve the problem step by step.

### Part A: Total Number of Packs of Water

1. **Total Number of Bottles Needed:**
   - There are 33 guests, and each guest needs 3 bottles of water.
   - Total bottles needed = $ 33 \times 3 = 99 $ bottles.

2. **Number of Packs Needed:**
   - Each pack contains 18 bottles.
   - To find the number of packs needed, divide the total number of bottles by the number of bottles per pack:
     \[
     \text{Number of packs} = \frac{99}{18} \approx 5.5
     \]
   - Since Oliver can't buy half a pack, he needs to round up to the nearest whole number, which is 6 packs.

### Part B: Total Cost of Bottled Water

1. **Cost Per Pack:**
   - Each pack costs $3.6.

2. **Total Cost:**
   - The total cost = Number of packs $\times$ Cost per pack:
     \[
     \text{Total cost} = 6 \times 3.6 = 21.6
     \]
   - So, Oliver will spend **$21.6** on bottled water.

### Final Answers:
- **Part A:** Oliver will need to bring **6 packs** of water.
- **Part B:** The total cost will be **$21.6**.

Would you like any more details or have any questions?

Here are 5 questions to expand your understanding:

1. What would be the total cost if each guest needed 4 bottles of water instead of 3?
2. How many packs would Oliver need if the water was sold in packs of 24 bottles?
3. If the price per pack increased by $0.50, how much would the total cost be?
4. What if Oliver decided to buy an extra pack just in case? How much would that cost him in total?
5. How would the number of packs change if there were only 25 guests?

**Tip:** When dealing with real-life problems that involve purchasing items in bulk, always round up to ensure you have enough.

Learn how to calculate the number of bottled water packs and total cost needed for a party with 33 guests, where each guest requires 3 bottles of water. This problem involves basic multiplication, division, and rounding. Suitable for students in Grades 3-5.

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