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The square root of a number is 2k. What is half of the nu...

The square root of a number is 2k. What is half of the number

A.

$\sqrt{\frac{k}{2}}$

B.

$\sqrt{k}$

C.

$\frac{1}{2}k^2$

D.

2k²

View answer & explanation

Correct answer is D

Let the number be x.

$\sqrt{x} = 2k \implies x = (2k)^2$

= $4k^2$

$\frac{1}{2} \times 4k^2 = 2k^2$

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