Question

Find the cube root of 81: 81−−√3
.(1 point)
Responses

27
27

9
9

81−−√3
root index 3 start root 81 end root

−9

Answer 1

To find the cube root of 81, we are looking for a number that, when multiplied by itself twice (i.e., cubed), gives us 81.

In mathematical terms, we want to solve:

\[
x^3 = 81
\]

We can express this as:

\[
x = \sqrt[3]{81}
\]

Calculating this gives:

\[
\sqrt[3]{81} \approx 4.326
\]

Since this is not one of the options given, let's review the choices:

- 27
- 9
- \( \sqrt[3]{81} \)
- -9

The correct answer is \( \sqrt[3]{81} \), or approximately 4.326, but with respect to the provided options, the best choice is:

\[
\sqrt[3]{81}
\]

Thus, if we are to select from the given options, the updated answer is:

\(\sqrt[3]{81}\)