Question

13. Let's calculate what must be added to 0.28 so that the square root of the sum is 1.
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Answer 1

Answer:

0.72 must be added.

Explanation:

0.28+0.72 = 1

Square root of 1 = $\sqrt{1}$ = 1

Hope it helps.....

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Answer 2

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Let x be added to 0.28 so that the sum is 1

By the problem,

=> x+0.28=1

or, x=1-0.28

=> x=0.72