https://file.aiquickdraw.com/mathbot/file/172579886939498xzao4s.jpg

The problem in the image can be broken down as follows:

You are given:

- A volume of blood: \(0.45 \, \text{liter}\).
- Conversion factor: \(1 \, \text{liter} = 1,000,000 \, \text{mm}^3\).
- The concentration of white blood cells: \(7 \times 10^5 \, \text{cells/mm}^3\).

You are asked to find the total number of white blood cells in the blood and express the result in standard form.

### Step-by-Step Solution:

1. **Convert the volume from liters to cubic millimeters**:
   \[
   0.45 \, \text{liters} = 0.45 \times 1,000,000 \, \text{mm}^3 = 450,000 \, \text{mm}^3
   \]

2. **Multiply the volume by the concentration of white blood cells**:
   \[
   \text{Total white blood cells} = 450,000 \, \text{mm}^3 \times 7 \times 10^5 \, \text{cells/mm}^3
   \]
   \[
   = 450,000 \times 7 \times 10^5
   \]

3. **Simplify the multiplication**:
   \[
   450,000 = 4.5 \times 10^5
   \]
   Now multiply:
   \[
   4.5 \times 10^5 \times 7 \times 10^5 = 31.5 \times 10^{10}
   \]

4. **Express in standard form**:
   \[
   31.5 \times 10^{10} = 3.15 \times 10^{11} \, \text{white blood cells}
   \]

So, the total number of white blood cells in the bag of blood is \(3.15 \times 10^{11}\).

Let me know if you'd like more details on any part of this calculation!

### Related Questions:
1. How would the result change if the concentration of white blood cells were doubled?
2. How do you convert from cubic millimeters to liters?
3. If the blood bag had \(0.9\) liters instead, what would be the total white blood cell count?
4. What is the role of white blood cells in the human body?
5. How do you express numbers in scientific notation?

#### Tip:
Always ensure that the units are consistent when performing calculations involving different measurements (liters to cubic millimeters, for example).

Sekantong darah memiliki volume 0.45 liter. Darah dalam kantong tersebut mengandung sel darah putih sebanyak 7 × 10^5 sel/mm³. Berapa banyak sel darah putih dalam sekantong darah? Tulislah hasilnya dalam bentuk baku.

Learn how to calculate the total number of white blood cells in a blood bag with a volume of 0.45 liters and a concentration of 7 × 10^5 cells/mm³. This problem involves scientific notation, multiplication of exponents, and unit conversions. Suitable for students in Grades 8-10.

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