Question

Which point approximates the 11−−√ ?

A number line is shown, marked with tick marks for integers from 1 to 7. 

Four points, labeled A, B, C, and D, are marked on the line. 

A is located at 1.

B is located at 3.

C is located at 4.

D is located at 5.

The points are represented by filled-in circles. 

Arrows at both ends of the line indicate that the line extends infinitely in both directions.

(1 point)
Responses

D
D

A
A

C
C

B
B

1 answer

To approximate \(\sqrt{11}\), we start by determining its approximate value.

Calculating the squares of whole numbers around 11:

  • \(3^2 = 9\)
  • \(4^2 = 16\)

Since \(9 < 11 < 16\), we know that \(3 < \sqrt{11} < 4\).

To get a more precise approximation, we can check some numbers between 3 and 4.

Calculating \((3.3)^2\): \[ 3.3^2 = 10.89 \] Calculating \((3.4)^2\): \[ 3.4^2 = 11.56 \] Since \(10.89 < 11 < 11.56\), we narrow it down to \(3.3 < \sqrt{11} < 3.4\).

An even closer approximation might be \(3.32\) or \(3.31\) and checking these: \[ 3.31^2 \approx 10.9561 \quad (too low) \] \[ 3.32^2 \approx 11.0224 \quad (too high) \]

So, it’s safe to conclude that \(\sqrt{11} \approx 3.32\).

Now referring back to the points on your number line:

  • Point A is located at 1
  • Point B is located at 3
  • Point C is located at 4
  • Point D is located at 5

Given that \(\sqrt{11} \approx 3.32\), the point that approximates \(\sqrt{11}\) is closest to point B at 3.

Thus, the best answer is:

B