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## Sagot :

Here are the steps:

1.

**Identify the given function:**The function modeling the views is [tex]\( f(x) = 33 \times (1.3)^x \)[/tex], where [tex]\( x \)[/tex] is the number of days the video has been online.

2.

**Substitute the number of days:**We need to find the number of views when [tex]\( x = 20 \)[/tex].

3.

**Perform the substitution:**Replace [tex]\( x \)[/tex] with 20 in the function:

[tex]\[ f(20) = 33 \times (1.3)^{20} \][/tex]

4.

**Calculate the exponent:**Compute [tex]\( (1.3)^{20} \)[/tex].

5.

**Multiply by the initial value:**Multiply the result from step 4 by the initial value, 33.

Following these steps, the calculated number of views is:

[tex]\[ f(20) = 33 \times (1.3)^{20} \approx 6271.638 \][/tex]

Therefore, the number of people who had viewed the video once it had been online for 20 days is approximately 6,271.

Thus, the correct answer is:

[tex]\[ \boxed{6271} \][/tex]