Answer
26
Work Step by Step
Typing $\sqrt {690}$ into the calculator we find that
$\sqrt {690}=26.26785$
Approximating the answer to the nearest whole number,
$26.26785\approx26$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.