The square root of 81 is 9. However, it's important to note that in mathematics, the square root can have both a positive and a negative value. So the complete answer is 9 and -9.
From the options provided, the correct answer is: -9 9, -9 9
Find the square root of 81: √81.
-9
9, -9
40.5
9
9 answers
Find the square root of 100: √100
10
50
10, -10
-10
10
50
10, -10
-10
The square root of 100 is 10. However, similar to the previous case, the square root can be both positive and negative. So the complete answer is 10 and -10.
From the options provided, the correct answer is: 10, -10.
find the cube root of 512: ^√512.
-8
8, -8
8
170.666...
-8
8, -8
8
170.666...
The cube root of 512 is 8, since \(8 \times 8 \times 8 = 512\).
However, cube roots can have only one real value that satisfies the equation, unlike square roots. The negative root is not typically included for cube roots as it is for square roots.
From the options provided, the correct answer is: 8.
find the cube root of -343: ^3√-343
-114.333...
7
-7
7, -7
-114.333...
7
-7
7, -7
The cube root of -343 is -7, since \((-7) \times (-7) \times (-7) = -343\).
From the options provided, the correct answer is: -7.
find the cube root of 81: ^3√81
^3√81
-9
9
27
^3√81
-9
9
27
The cube root of 81 is not an integer. It can be expressed as \( \sqrt[3]{81} \), which is approximately 4.326.
From the options provided, none of the answers are correct for the cube root of 81.
To recap, the correct answer for the cube root of 81 is approximately \( 4.326 \) or expressed in radical form as \( \sqrt[3]{81} \).